Hi Dave, glad you find it useful.

I'm not at my PC right now to be 100% certain but cover art setting are in options/meta data. You have to open the menu settings for that. Simply select the size you want
E.g. 2000x2000.

Note that it may not always find such a size so you sometimes have to check all the options that it finds and select the one you prefer. As per the guide it takes only a few moments to do that.

Select "prefer local data" in your Sooloos import setting and it will default to you chosen cover art.

Rgds,
Nick