I moved things around, and got it to work from SCH to PCB, with the error that you noticed (7805) Also I don't have the correct 18LF2520 footprint.
I may be getting the words wrong, because for me it is complicated, but i understand that this is a good system, once I practice with the changes.
I have old libraries mixed with the new once, and think i ought to start again, without the old ones, fresh.
So I'm going to delete everything and restart.
EDIT: does the new program support surface mount regulators and surface mount 18LF2520 please?