I found this thread via Google, after having exactly the same problem - after upgrading to 7.1 on Win10 x64 it just hung at the splash screen.
I managed to fix it though. In the log file (C:\ProgramData\UMS\debug.log) I found:
INFO 2018-06-28 14:29:32.646 [main] Using database located at: C ...
Search found 1 match
- Thu Jun 28, 2018 4:47 pm
- Forum: Help and Support
- Topic: Stuck on Splash screen
- Replies: 5
- Views: 16111