Im running Siematic S7 5.6 in german and i cannot change the language of the program. When changing the language (under Extra-> Einstellungen->Sprache) to english it gives a prompt to shut down the program but when i restart the program the language is still set to German.

This is an old project which is installed in a factory. This program is running on a PC that is set to English language settings (was Dutch) but this also doesn't change the language.

Are there any steps I can try to fix this issue