Last good logbook was months before... all three of my recent saves were fine when saved but refused to load.
Map had already been set to None as per other posts in this thread.
I did not try a full clean reboot before loading though. Noted for next time. Will also go through my plugins and disable the unused ones.
In the end my partner managed to split my logbook into pre-2014 and post-2014, the latter I'm currently populating with my recent data.
Such a shame that ST won't handle a big logbook as I've been using it since 2008 and it would be nice to have all my rides in one place instead of 3-4 logbooks.
Not using Mobi.
Thanks for the post.