TFStudio 1.7.4

Important

Rebuilt 12 September 2026. In the first 1.7.4 build, importing a measured spectrum in Spectrum Exchange blanked the app. That is fixed. If you downloaded 1.7.4 before this date, download it again.

Changelog

v1.7.4

Added

• Italian language added in UI. Machine-translated, so corrections are welcome.
• The optimizer windows and the Merit Function Editor warn when the targets reach outside a material's data range, as the analysis windows already do.
• n,k Characterization: while an extraction runs, the control row shows which stage it is at and how long it has been running.
• GD/GDD: targets can be drawn, dragged and deleted on the plot, as in Optical Evaluation. A click adds a target at one wavelength; a drag across a band adds a flatness target.
• DevTools opens from the View menu, or with Ctrl+Shift+I, in installed builds as well as development ones, so a problem can be looked at and reported where it happened.
• Double-clicking a design in Explorer or a Linux file manager opens it in TFStudio, in the copy already running if there is one; the Windows installer and the Debian package set this up, the portable builds do not. A design already in your projects opens as itself, and one from anywhere else is copied into your projects first.

Changed

• n,k Characterization: Drude-Lorentz fits run about three times as fast with the thickness solved.

Fixed

• Localized hardcoded UI strings.
• A damaged or hand-edited design file says what is wrong with it instead of opening to a blank window, and one bad file in a project folder no longer stops the rest of the folder loading.
• n,k Characterization: a metal fitted with the thickness held no longer comes back as plain Drude when the spectrum needs Lorentz terms; the oscillator count is chosen the same way whether the thickness is held or solved.