At vers. 3.4.3 he also loses the preferences, language, € sign and all the changes I've made, but only since I've installed 3.7 paralell
I will only do backups, I will reinstall Windows 10 on the laptop and PC. and I will only install TTD 3.7.3 and not 3.4.3. I'm probably going to have problems with the TTD license again, as always when I reinstall Windows (as described in MARCO's countless emails).
I will keep you up-to-date