Hi, apologies for the delayed response.
It is likely that you got a bad install.
Assuming you have a SRV directory at C:\Program Files\Opentoonz\ if you rename the t32bitsrv.exe file then the problem will likely be resolved.
Assuming that is in fact the problem it is likely the issue is with a 64bit DLL in the main Opentoonz program directory but you don't want to remove or rename that one.
the t32bitsrv.exe file is used for supporting the .MOV (apple quicktime) movie format which now is supporte through FFMPEG.
As such renaming or removing that file shouldn't effect other operations.