If you are running Studio 19.5 and your preview keeps going wrong - showing black frames as you play or scrub - then Pinnacle have released a hotfix.

This isn't a full patch, so it hasn't been tested exhaustivly, so DON'T apply it if you don't have the problem!

1. Close Pinnacle Studio 19. 

2. Backup:  Many files will be replaced, so we recommend to backup these folders before overwriting contents with new files.  

Open C:\Program Files\Pinnacle\Studio 19\ and save backups of the folders

\Programs

\Plugins

3. Download the new files:  http://cdn.pinnaclesys.com/SupportFiles/Studio_19/FixBlackFrameFor19.5.1_64bit.zip

4. Unzip, and copy the files in \Plugins and \Programs to their respective directories.  

5. Open Studio 19.