I need your help. I worked on a new RC model and now i cannot open the scn file anymore

This is shown red at the bottom of the window.
"Unable to create object[CLSID\{fancy number letter combi}]: %SUMATRAPATH%\moaudio.dll, Cleanup will be performed"

Do you know where to find the opening error log? Or even better how to fix this?


==EDIT==

runonce does not fix it

==EDIT2==
I've just uninstalled and reinstalled XSI, it's the same problem. I can no longer open any scn file. Hopefully anyone of you has an idea what happend

I had this problem last year. Running Mod Tool in Admin Mode fixed it for me.

Gonna try that. For now I just downloaded the 2015 version and that works.