I just pulled and built master, and installed it over my previous (olde…) 1.38 (git >= 75d3c9f12) (my head was actually at 11a1f32fd490b3918d069f0d05cca5bbc6c4b5ad, not 100% sure what was really installed, but it ough to be very close to 1.38).
Anyway, when restarting Geany, it didn't restore any file from my session. I see *No user session file found, trying to use configuration file.* but nothing gets loaded then, although my *geany.conf* does 120 `FILE_NAME_%d` entries.
I didn't investigate yet and unfortunately don't have time to right now, but I guess it has to do with session-split not properly falling back somehow.