Same over here too: iTunes playlist are giving problems on my Win10 system after update to 2.0.0. As I’m using the same Playlist over & over, which are updated via iTunes (so contents of a playlist is changing while the name remains, i.e. a Playlist “2021”), I always have to delete the old instance in Engine and re-import the same playlist again. Before those actions worked (have to admit before “updating iTunes” also took a lot of time, but it worked). I was hoping with the new release a new feature “iTunes sync” would be deployed as the re-import is really a pain in the *ss.
Also updated to 2.0.1, but still it can’t re-import new iTunes playlist. Luckily I still got my edited Collection (beatgrid, hotkeys & loops), but I don’t have Playlist (as they are coming from iTunes & import is not working anymore). I assume it’s a high prio problem, so I’m hoping that release 2.0.2 will come soon solving this issue.
I’m not planning going back to v1.x as I really do like the new layout on my SC6000’s after updating them to 2.x 
I’ve been playing further with iTunes/Playlists after my update to v2.0.1. I’m able to see my iTunes playlist after waiting 15min to load my iTunes Collection (about 10K songs). In my structure, I have a tree:
Yesterday I selected a playlist from “-PREPARED SONGS IN ENGINE”, which could be added to my collection. But as my other wanted playlist are coming from the same root (being “-MY DJ STUFF”), I couldn’t add them. Today I’ve deleted the imported Playlist from yesterday and then I’m able another Playlist Folder called “-MATCHES”, containing multiple playlists:
But after importing now that playlist, it’s not possible to import other playlist under the same root “-MY DJ STUFF”.
So it seems that once you selected something in a folder structure, that you can’t import other items under that same structure.
In short: it’s everyhing or only 1 folder/playlist in a tree structure. As I’m using multiple Folder/Playlist from the same tree structure, that’s now not possible to import. Perhaps splitting your folders/playlist in iTunes is a temporary solution? Need to check that…
OK, it’s indeed the structure that’s giving problems I’ve moved the Playlist folder onto iTunes root (drag&drop)
Now it’s possible to import different Folders into my Engine Collection:
And for other folders that aren’t into the Engine Collection, I can import them if wanted:
BTW: my collection isn’t that big but it’s not small neither. At home I’m using Sonos connected to my hifi. That has a bug/limitation of number of files in playlist: if you all your playlists are too big for the system limit, then it’s doesn’t show the playlist. The workaround is playing with your playlist:
adding + in front gives prio to this playlist
adding - in front excludes a playlist from being loaded by Sonos
Perhaps this is a reason why people with big/huge library/playlist don’t see the desired playlists? A certain limit…
However, yesterday I had to find out on my laptop that it was not reading my (huge) iTunes library (approx. 45K titles). It gets stuck forever when importing the playlists.
Then this morning I tried with more CPU power on my desktop. At least some / the first playlists are read in here, but I only saw them after restarting the software …
Consider going back to Engine Prime 1.6.1. Then I have to downgrade the player to 1.6.2 again. …
. Use EDIT if you can/will to alter a made post.