It’s possible to re-install Linux without losing your /home data even if it’s installed in a single partition. There are a couple of extra steps involved to achieve this but it’s not difficult. As always, keep your data backed up and current.
I used VirtualBox for years and it was a fine and stable piece of work. (I don’t use it anymore, though, so don’t have the latest news about it.)
If you lose your Downloads folder again you simply can create a new one in the proper location. It will be empty of course but the OS will recognize it. It looks for a folder (a.k.a. Directory) named Downloads (or Templates, or whatever) but there’s no special ID serial number attached AFAIK.
My experience is pretty much “stock” Ubuntu or elementary…
Most of my “default” folders that get special icons and bookmarks in Nautilus or “Files” are shortcuts I create… soon as new install’s booted up and I’ve got my Dropbox and Resilio Sync “sync’d” - I fire up a terminal :
rm -Rf Music Pictures Documents
Then create new “files” for those defaults which are symlinks :
Delete “rm -r Document Downloads Music Pictures Videos” folders in my /home directory.
Then run “mkdir Documents Downloads etc” to make new folders in the DATA partition.
Finally create symlinks x5: “ln -s /mnt/DATA/Downloads /home/username” change to Docs Vid etc
They are made in the DATA storage partition, which produces new Document Downloads etc folders (with the symlink arrow symbol to inform me they are active) in your /home directory.
You have a little trouble and transform in a big issue.
My suggestion ( not know if go works )
at command line:
1- Go for your home directory ( cd ~ ) without parentesis hein …
2- md Downloads/ ( write this form ) this create the Downloads folder
3- search in Internet a new icon for your Downloads folder.
4- Now in file manager, select the folder Downloads and right click propriety …
5- Choice your new icon, and done
You should keep the hair short, and so avoid “hair pullings”
but probably no go avoid pulling ear
Funny the part, when needs help, no hesitate in put your issue