Stuck on Preparing Scene Data (C4D) Please Help

[maru]

Are you using custom startup file - new.c4d? If so, please try removing it. There are known cases of problems like this when re-rendering a scene saved with older Corona version. This could also happen if you are rendering an older file.

[Behrendt]

Update - it works now for me. I had a "new.c4d" - but it wasn't the problem. It seems my preferences in general were causing it. For testing I deleted them completely so C4D would create clean ones, and now it works.
But do you have an idea what exactly might be causing this? I carry my prefs with me for a long time, since I customized a lot and it would be nice to be able to keep them.