When I attempt to create an angled guideline, I get an “access violation” error.
I don’t see this issue in 15.0.0.3019.
This is an unofficial bug-fix release.
https://www.high-logic.com/tmp/fontcreator/FontCreatorSetup15.0.0.3019-x64.exe
Yes, that is a confirmed bug and is already solved in more recent releases, but those are not official yet. I recommend to upgrade to the release Bhikkhu Pesala refers to.
I will wait for the official release, as I can still reproduce the issue with version 15.0.0.3019.
Actually this is the most recent release today:
https://www.high-logic.com/tmp/fontcreator/FontCreatorSetup15.0.0.3021-x64.exe
OK, thank you. I will try. I had done a fallback to 3006 (which I still had handy on my Hard Drive) which does work… thinking positive thoughts… 
