Been having issues with Platinum with previewing presets on plugins. Error messages appear which promptly follows by a crash. It seems that my issue lies with Auto Save : Changes...which were set to 40 for me. Set Auto Save to 0 and the problem goes away.
 
It seems by selecting a different presets in a plugin this constitutes a number of changes in one hit. Platinum clearly doesn't like this (well on my system).
 
Support are aware of this and looking into this as I never had this issue running X3....

Are you on latest version (Manchester)?  What happens if you set Autosave to a higher number of changes, say, 100?

Yes, now on Manchester. I did try that...set it to 200 and that was better. So either way set to 0 and let it save every given few minutes or set it with a high value seems to work...