This has happend something like each 3rd patch. It downloads the patch, installs it and when I launch the game it starts doing it over and over again. I have no idea why. I can usually solve the problem by downloading the latest full version and reinstalling it. Which sucks.
Also I cannot use two different versions of BattleDex - usually the test server has a higher build. So each time I install the test server version, the other one "gets corrupted" and I need do reinstall it (which makes the test server version corrupted). This also sucks. I even tried different HDDs and partitions, even my USB stick and I checked the registry for some file paths but found nothing.
Do you have any explanation or better yet a solution for this? It would be cool if BDex was "portable" meaning it starts only out of the folder it's currently in, if you know what I mean.

It's probably an issue with Launcher.exe or Battledex.exe.
I don't know what exactly it is, but there were more bugs like this, if the devs want to scroll through the section.