Applied films that were created could not be saved or exported. This has been fixed.

Exporting glazing systems generated a message that the operation failed because the glazing system type is unknown.  Glazing systems can now be exported to file (e.g. to view the spectral data), but the structure information will be lost.

Changing the film of an applied film product did not clear the productname. This has been fixed.

When a standard file could not be found at program start-up, Optics did not warn the user that it automatically selected the next available standard file. This has been fixed (an appropriate message is given).

The schematic view was incorrect on computer screens with a low resolution, when very thin films were selected. This has been fixed.

The tooltips in the database for adding glazing to glazing systems was referring to laminates. This has been fixed.

Warnings about opaque layers are no longer displayed on the Warnings tab - opaque layers do not affect the reliability of layer or system calculations, these warnings were unnecessary.

The pane absorptance of each layer in a glazing system is calculated. This value is shown when you select
the solar spectrum from the menu:

  Tools | Select Spectrum | Solar properties 

Note: The calculated values are the solar absorptances in the glazing system.

New (Empty) User Databases can be generated from the menu by selecting:

    Database | Create new user database
 

The user options have been extended. When you select:

    Tools | Options

and click on "Other preferences" you will see 3 extra options:

    - Default side for applying films to substrates (default = back)
    - An option to automatically switch to schematic view after glazing edit (this switching used to always take place)
    - An option to automatically switch to the warnings after glazing edit (overrides viewing the schematic view, when errors occur)
 

It is now possible to insert and delete any layer in a laminate (when it does not conflict with any of the other rules that apply to a laminate). The methods for adding, inserting and deleting layers in laminates are now similar to the same operations for glazing systems.

All glazing products can now have long filenames (maximum 50 characters) instead of the old DOS 8.3 convention.

When a single layer is loaded it fills only half the schematic view to make the appearance more natural.

The Help | About Window now shows the version number of the program including the version number of the Maintenance Pack (in this case Maintenance Pack 2) and the version numbers of dependent dlls.

A typing error in the standard file NFRC_300_2003.std has been corrected.

The obsolete standard file WINDOW5_NFRC.std has been deleted.

When the program was quit and the glazing system was saved, the program incorrectly showed the laminate name instead
of the glazing system name. This has been fixed.

The menu item "Help | Optics FAQ" incorrectly opened the database page instead of the FAQ page. This has been fixed.

Some coated laminates could not not be saved. When a laminate was constructed that included a layer without IR-data,
but that also included an outer layer with IR-data, the emittance source of the outer layer was incorrectly set to
"spectral data" although the IR-data of the laminate could not be determined in that case. This caused an error in the save procedure.

When importing text files, the NFRC_ID was always changed to a value above 30,000. This behavior was included to prevent
existing files in Window5 from being overwritten. However, new files always have a NFRC_ID below 30,000. These files
received a new NFRC_ID on import. This has been fixed. Resetting the NFRC_ID to the first available number above 30,000
is now an option instead of a requirement. It is still the default option though.

When an applied film was added to a laminate, but the applied film was orientated in such a way that the film was facing the
interlayer the program did not offer to flip the layer (like with coated glazings). This has been fixed.

The menu item "Database | Add/Replace layer" was always enabled even when a layer could not be added. This has been fixed.

Changing the coating name twice in one action, but canceling the action the second time caused Optics to crash. This was caused
by the fact that the cancel action reset the coating name to an empty string, although it had already been set by the first action.
This has been changed. Canceling the action at any time completely cancels the action. It also cancels the first action!

Text files with IR-data but with missing substrate could not be imported, because the emittance values were not calculated.
This has been fixed.

Glazing layers

	Manipulating layers (changing thickness, substrate, film and/or coating) can be done inside laminates and glazing systems.
	User-manipulated glazing layers will automatically be assigned a NFRC_ID of 30,000 or higher and the user is forced to change the filename of this layer and/or its substrate to denote that the properties have changed. This will prevent entries in the Window5.1 database from being overwritten automatically when importing NFRC accepted files.
	It is now possible to create double-coated glazings, i.e. glazings with a coating on each side. These double-coated glazings can be saved to a user database but cannot be manipulated any further after the second coating is applied.
	It is now possible to create glazings with a coating on one side and an applied film on the other side by applying a film to a coated glazing. These special glazings can be saved to a user database but cannot be manipulated any further after the film is applied.

Glazing systems

	Multi layer glazing systems are no longer limited to 5 layers (glazing slots). A glazing system can consist of any number of layers.
	The gap width can be changed by the user. The same gap width is used between all layers in the schematic view - gap width does not affect optical properties.
	Glazing systems are now saved to the user database as type "Glazing system". This type of glazing and the type "Interlayer" cannot be exported to Window5.1.  Saved glazing systems can be re-loaded and edited later.

Laminates

	The laminate editor is no longer a separate program. Creating new laminates from existing components can be done in Optics.
	It is now possible to create laminates with embedded coatings, i.e. coatings on a glass layer next to an interlayer. This can only be done when the coating manufacturer has supplied enough information to allow Optics to perform such an operation.
	Laminates are no longer limited to 6 layers. A laminate can consist of any number of layers.
	The program supplies improved feedback when the user tries to create an invalid laminate (e.g. when trying to combine two rigid layers without an interlayer).

Databases

	Optics only works with the International Glazing Database (IGDB) version 12.3 and higher. IGDB version 12.3 has significantly enriched product information compared to version 12.2, see also the IGDB homepage.
	The glazings are automatically sorted in groups that show the possible operation that can be done with it. Example 1: embedded coatings are grouped under a tab called 'Embedded coatings'. Example 2: when applying a new coating to a glazing, Optics will only show the new coatings that can be used for this operation.
	It is now possible to switch between multiple user databases.
	A 'Find' feature has been added to quickly find glazings by their filename, NFRC_ID, product name or any other feature. This feature has a short-cut key located under CTRL+F.
	The glazing type "interlayer" has been added.
	Reference laminates that are used to calculate interlayer data from but that have missing or incomplete structure information, are not shown in the database.

Standards - Wavelength sets

	The default standard is called "W5_NFRC_2003". This standard is to be applied for NFRC rating purposes. This standard supercedes the older standards "Window5_NFRC" and "Window4". All values that are shown in the database are calculated with the "W5_NFRC_2003" standard.
	Other standards that are still supported are: "CRI", "ISO_9050", "prEN_410". The "RADIANCE" standard is used internally to export Radiance text files.
	The only and default wavelength set that is used is "Optics5". This wavelength set is similar to the one that is required according to the data submission procedures of the  International Glazing Database.
	A second wavelengthset ("Color 5nm") is only used internally by optics to calculate photopic properties according to certain standards that require this wavelengthset.

User interface

	The program offers improved feedback in the form of tooltips.
	The program warns the user when a calculation results in errors or when results are less reliable due to lack of information. Warnings are listed per wavelength and can be exported to a text file for further analysis.
	The program offers OLE-drag-and-drop from the database to the glazing slots and to other programs.
	The program offers a quick link to the internet to check for the latest version of the International Glazing Database.
	The menu structure has been changed.
	The database grid uses bookmarks to lookup the most recent selected glazing in the database grid automatically.

Other

Text files with extra header information are supported.