I have tried several themes, none of them are working. I have used Launchbox for a long time now, but I have never seen this before. This problem happens on a new installation of Launchbox (13.17) on Windows 10 Enterprise IoT.
I am able to download the theme and after I hit apply as main theme only the menu of the theme has changed but still the default theme is loaded as the graphical interface. It's really a weird issue.
Launchbox is running on it's own SSD which is seperate from the OS NVME. I never had this issue in Windows 11 before.