Ok, I seem to have fixed the problem myself now. I first downloaded the latest version of FMODex sdk and replaced all lib, inc and dll's in openframeworks for the newer FMODex(Stable 4.44.59) do not forget to update the linux files if you do this! This did not immediately seem to fix it, but I assumed I needed to clean and rebuild the my whole project to make sure this new files are fully integrated into my project.
So I did that, and after rebuilding my output window notified me that fmodex dll's where rebuild and after this my project runs fine.
Now I have to admit I didn't run a clean/ full rebuild before I downloaded and replaced the old FMODex sdk with the latest. So maybe a full clean/rebuild would have been the solution here, but I didn't really understand what was going on until I fixed it.
