downloadable collections will not open

You open the mcc collection and let it update after you download odst

It doesn't matter what approach I take, it crashes every time I try to open the Collections panel to download a new collection. No warning, just closes.

Same here. I've downloaded a puzzle collection and nothing, took my coins though. It's impossible for me to open the daily challenges.

AppData is a hidden folder so you will need to see hidden folders in file explorer.
Microsoft Jigsaw should not be running when you do this.



The downloaded collection files are in your User\UserName directory (if you do not know where it is, just open a regular command prompt), the rest of the path is AppData\Local\Packages\Microsoft.MicrosoftJigsaw_8wekyb3d8bbwe\LocalState\DownloadedPuzzles
which should have a folder for every one of your collections (WinterWonderlandPack for Winter Wonderland Collection).
Just delete the ones you do not want, you will not need to purchase these again (gold or $), the collection should now be seen under Downloadable Collections with a download link to download it again if you desire to and not in My Collections.

AppData is a hidden folder so you will need to see hidden folders in file explorer.
Microsoft Jigsaw should not be running when you do this.

The downloaded collection files are in your User\UserName directory (if you do not know where it is, just open a regular command
prompt), the rest of the path is AppData\Local\Packages\Microsoft.MicrosoftJigsaw_8wekyb3d8bbwe\LocalState\DownloadedPuzzles which should have a folder for every one of your collections (WinterWonderlandPack for Winter Wonderland Collection).
Just delete the ones you do not want, you will not need to purchase these again (gold or $), the collection should now be seen under Downloadable Collections with a download link to download it again if you desire to and not in My Collections.