Seems like now it stopped working for me again. win 7 64x bit os here, running wow dx11 and 32 bit and both HB and wow as admin.
A solution would be nice indeed, i have no idea what could be wrong with it. edit // I restored my system back like 3 days ago, now Hb intializes well and been restarting it a few times without problems, i guess i fucked up some system settings.
Removing "Singular" from "Routines" dir and adding another Routine helped me. Maybe this helps someone.
This also worked for me. Singular has issues right now. Of course it is only a Dev version, so not complaining, just letting it be known =P