Chettagadeng

Thank you! I've been struggling with this for ages too, your fix worked perfectly for me.

Yes, and yes. Although the new install I've created that is working isn't using the steam loader.

I've created a new install from my backup clean install of KSP, re-installed all my mods and copied the save file over. It's working properly now and I can select a vessel, so something must have been broken in the install I was using. That's the downside of installing >100 mods :-/

I'm having trouble selecting a craft to build, I've been able to do it before in this save file but now in the UI it just shows this: and I can't load the vessel. I've reinstalled the mod, but that's not helped. Has anyone seen this problem before?