This version use last sdk and looks to libs32/libs64 folder.
Some steps to check:
if you have copied octane.dll, octane.dat, new.c4d files under C4D Main folder remove these.
If still has problem start without c4doctane and remove Octane windows from saved layout.
Remove other plugins only for testing, after put back.
Last one is delete oct.dat from c4d user preferences folder.
Try with english version of c4d