Found a bug under WinPE. The GUI mostly isn't working when executing uT V1.7.1. It is however working (downloading and uploading). Under WinPE we start uT with the /hide option. For troubleshooting purposes we use the BOSS-Key. That is how we discovered that the mostly doesn't start because the BOSS-key function failed. Version V1.6.1 doesn't have this problem. I already informed Alus about it (but I think he's taking a vacation)