Thanks for that. Downloaded the zip from github, uninstalled the old addon, installed from zip file, set both video and music libraries to update with a 1 hour interval, left notifications on, select OK (notification informs me when the video library is happening, but doesn't mention music - is that normal?).
Anyway, checking the log an hour later the music update doesn't appear to have run. I haven't actually added any new media, so I have no way of checking this within the GUI:
22:09:19 T:3040780928 NOTICE: DVDPlayer: finished waiting
22:09:19 T:3040780928 NOTICE: COMXPlayer::CloseFile
22:09:19 T:3040780928 WARNING: CDVDMessageQueue(player):
ut MSGQ_NOT_INITIALIZED
22:09:19 T:3040780928 NOTICE: COMXPlayer: waiting for threads to exit
22:09:19 T:3040780928 NOTICE: DVDPlayer: finished waiting
22:09:19 T:2810180672 NOTICE: Thread Jobworker start, auto delete: true
22:09:22 T:2760856640 NOTICE: Thread Background Loader start, auto delete: false
22:09:22 T:2938106944 NOTICE: Thread Jobworker start, auto delete: true
22:09:30 T:2777633856 NOTICE: Previous line repeats 1 times.
22:09:30 T:2777633856 NOTICE: Thread Background Loader start, auto delete: false
22:11:16 T:2810180672 NOTICE: Previous line repeats 1 times.
22:11:16 T:2810180672 NOTICE: Thread Jobworker start, auto delete: true
22:11:18 T:2938106944 NOTICE: Previous line repeats 1 times.
22:11:18 T:2938106944 NOTICE: Thread Background Loader start, auto delete: false
22:11:19 T:2938106944 NOTICE: Thread Jobworker start, auto delete: true
22:11:24 T:2777633856 NOTICE: Thread Background Loader start, auto delete: false
22:27:07 T:2810180672 NOTICE: Thread Jobworker start, auto delete: true
23:00:00 T:2921329728 NOTICE: Previous line repeats 1 times.
23:00:00 T:2921329728 NOTICE: service.libraryautoupdate: Starting network check
23:00:07 T:2921329728 NOTICE: service.libraryautoupdate: Update Video Library
23:00:07 T:2921329728 NOTICE: service.libraryautoupdate: Starting network check
23:00:07 T:2810180672 NOTICE: Thread CVideoInfoScanner start, auto delete: false
23:00:07 T:2810180672 NOTICE: VideoInfoScanner: Starting scan ..
23:00:09 T:2921329728 NOTICE: service.libraryautoupdate: Waiting for other scan to finish
23:00:35 T:2810180672 NOTICE: VideoInfoScanner: Finished scan. Scanning for video info took 00:28
23:00:35 T:2938106944 NOTICE: Thread Jobworker start, auto delete: true
23:00:37 T:2921329728 NOTICE: Previous line repeats 1 times.
23:00:37 T:2921329728 NOTICE: service.libraryautoupdate: update timers
23:01:00 T:2921329728 NOTICE: service.libraryautoupdate: Starting network check
23:01:05 T:2921329728 NOTICE: service.libraryautoupdate: Update Video Library
23:01:05 T:2921329728 NOTICE: service.libraryautoupdate: Starting network check
23:01:05 T:2760856640 NOTICE: Thread CVideoInfoScanner start, auto delete: false
23:01:05 T:2760856640 NOTICE: VideoInfoScanner: Starting scan ..
23:01:07 T:2921329728 NOTICE: service.libraryautoupdate: Waiting for other scan to finish
23:01:40 T:2760856640 NOTICE: VideoInfoScanner: Finished scan. Scanning for video info took 00:35
23:01:40 T:2938106944 NOTICE: Thread Jobworker start, auto delete: true
23:01:42 T:2921329728 NOTICE: Previous line repeats 1 times.
23:01:42 T:2921329728 NOTICE: service.libraryautoupdate: update timers
23:06:06 T:2938106944 NOTICE: Thread XBPyThread start, auto delete: false
23:06:06 T:2938106944 NOTICE: -->Python Interpreter Initialized<--