Hi Bonny

I am slightly confused myself with Handfuls answer to you, with regard to how to correctly set up your audio watch folders.

Basically the folders you wish to watch must have an uncrossed eye. The simplest way to do this (For most users) is to ensure at the first usage, that Canola is set to scan everything from the top level down i.e. audio clips, removable card, and internal card, all have the clear eye icon (NO Line through the eye )

If you have a line crossed eye at the top level Folder then you are able and must select that level to delve deeper into it's sub Folder levels and have a clear eye (To scan) or a line crossed eye (To not scan) on particular Sub-Folders in line with your requirements.

Well at least this is my current understanding of how watch folders work.

In conclusion and in your case, I would go into every sub folder level and ensure eye icon is clear and then set top level to be clear also. (Switch off and hard reboot the device, by removing battery for 10 seconds, after switched off) Then re-run the Canola tuner where hopefully it will find more album covers.

---edit--- Thinking a little more about the album cover scanning, don't forget that this needs you to be connected to your Wi-Fi connection and the internet to do its job correctly. Are are running this programme to tune Canola https://garage.maemo.org/projects/canola-tuning/ ?