Unable to select which version to use

Hello,

I recently installed UltraMixer on Debian GNU/Linux. The installer works as a charm and when I first started the program, I was presented with a screen asking which version of UltraMixer I wanted to use (Pro, Demo, Free, etc…) However, wanting to do something else first, I clicked the cross button of the window and UltraMixer closed. Now, when I try to start UltraMixer says my License Key is invalid or expired and asks me if I want to use the Demo version or purchase a license. When I click on Use DEMO Edition, it says I have to restart UltraMixer and then it should run in Demo mode. However, when I restart UltraMixer, I am presented the same screen all over again.

I tried uninstalling UltraMixer with the uninstaller, manually (by deleting /usr/local/UltraMixer and the Java configuration files in the home directory), but nothing helps; when I reinstall UltraMixer I get the same message.

Does anyone have a clue what to do on this one?

Greets,
Eric

PS
I use UltraMixer v. 2.4.0 with the following Java version:

java -version

java version “1.6.0_0”
OpenJDK Runtime Environment (build 1.6.0_0-b11)
OpenJDK Client VM (build 1.6.0_0-b11, mixed mode, sharing)