PhotoStructure’s sync process should wake up periodically, see what scan paths haven’t been visited for a while, and restart a sync for each of those paths.
This is controlled by the syncIntervalHours setting, which defaults to 24 hours. This topic was brought up a while back, too.
This had been handled by a main when sync got periodically restarted, but if sync is long-lived, I just realized I needed to add an additional “kick” to make sure daily scans happen when they should. This will be added in the next build.
Thanks for bringing this to my attention!