Replacing the NemoEngine.dll will solve the issue
Instructions to replace the NemoEngine.dll:
1. Click here to download files. Unzip.
2. Close Pinnacle Studio.
3. In Windows Explorer, browse to C:\Program Files\Pinnacle\Studio 20\programs
4. Find the existing file: NemoEngine.dll, rename it to NemoEngine.OLD
5. From the unzipped download, copy the new file NemoEngine.dll into C:\Program Files\Pinnacle\Studio 20\programs
6. Start Pinnacle Studio 20, the crash when exit should be fixed.