This method has worked on every machine I have needed to fix.
Re-install Archicad - repair option is fine, no need to un-install.
Do not start Archicad.
Install Goodies - make sure you have the correct language version for you language version of Archicad - this is important.
Install the latest hotfix (update) for Archicad.
Now start and all should be fine.
If that doesn't work, then you will probably need to contact your local Archicad support so they can look into it.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10