RomCenter menu grayed out & no databases

[romcenterproblem]

I have a strange problem with RomCenter. I hope someone can solve this problem.
After starting the program (installed or no-installed version) everything is grayed out:

screenshot.jpg (72.72 KiB) Viewed 22711 times

- Pull-down menu's are shown but disabled (grayed out)
- Icons are shown but disabled
- RMB menu's are shown but disabled
- No databases shown
- No error message

Windows Vista x64
RomCenter 3.7.1 / 3.6.4 / 3.5.2 (install & no-install versions)
RomCenter 2.70 (this old one works)

The log:
=============================================
Welcome to RomCenter 3.7.1
Database Engine WI-V6.3.1.26351 Firebird 2.5
Template database version = 3,7002
Checking new romcenter version...
Ready
No updates found.

[Wanderer]

Hi there.

You just have to create a new or open an existing database in order for the menus to become active. You must have a datafile, import it to a new database and everything will become enabled.

What systems are you interested in? Do you have a datafile for them?

[romcenterproblem]

Feeling stupid...like have you plugged in the cable and turned you computer on.

You're correct. File > New or File > Open starts the magic.
The provided datafiles are sufficient for my games.

[Wanderer]

The provided datafiles are sufficient for my games.

Great. No worries. Feel free to ask here if you need any extra help.