There has to be a better way than clicking import, waiting for PA to restore down, clicking on the desired system, clicking load, waiting for PA to maximize, clicking on import, waiting for PA to restore down, etc and repeating that 41 times. Uber plz.
PA Hub has a Map Store that works in conjunction with the System Sharing mod to allow you to download/install maps locally, as easily as mods. You can also use this guide to create a map pack manually: https://forums.uberent.com/threads/guide-creating-a-map-pack.65818/
I've thought of doing a bulk export/import, but it would be single file. You'd have to either pre-process a collection, or set up simple web server and and a file list.
A couple of patches ago this was broken and you couldn't import in windowed mode; looks like it was fixed though so thanks Uber for that!