macOS Catalina: Cannot Open Files

[jkulesza]

Valid files created by TikZ-Editor on macOS that are saved cannot be re-opened on a subsequent execution. No error/message is given, but the file is not displayed in the editor. This has been reproduced on two different machines with macOS Catalina (10.15).

Steps to reproduce:

1. Launch TikZ-editor.
2. Create a file, e.g., \draw (0,0) circle (1);.
3. Save the file, e.g., ~/Desktop/test.tex.
4. Quit TikZ-Editor.
5. Re-launch TikZ-Editor.
6. Try to re-open the file.