Hey MRC! I think this has been a common problem with editor files - you can find a thread about it in the Bugs thread:
SI is working on a fix, but it doesn't seem like there is one coming soon. I had a similar issue with my US database - I can't get it to verify in advanced mode because of the empty discipline rules issue (and manually re-adding the rules doesn't fix the problem), so I've had to use it in basic mode. I'd suggest loading up your file with the minimum number of leagues you need to have, create an unemployed coach, set your autosave to half an hour and then go on vacation and let it run overnight to see if it crashes to desktop anywhere. That may help you see if it's stable - the empty discipline rule hasn't caused a CTD for my database so far.