Please uninstall the previous Beta version before installing this version.
If the problem still exists, please send over the Debug Log and bugreport.txt files of this build. I also added some debug code so the Debug Log should contain more valuable information for me, if the problem still exists.
This beta build does not attempt to address any other reported issues, so no need to test them or re-report. I'll first try to fix the startup problem, after that it's time to move on to the smaller issues.