Deleting and Recycle Bin
Delete sends files to the Windows Recycle Bin, and Ctrl+Z brings them back.
Shift+Delete deletes permanently, bypassing the Recycle Bin: it's the only one of Wander's own operations that can't be undone, so it always asks for confirmation.
Whatever involved the deleted files leaves the undo history; the rest stays.
There's no “Delete permanently” item in the menu, on purpose.
The Recycle Bin opens right in Wander, from a standard bookmark on the left. You can see where each file was deleted from and when; “Restore” is the first menu item and works on several files at once. Other operations in the Recycle Bin are turned off, and you empty it with Windows tools.
If a file doesn't fit in the Recycle Bin (its path is longer than 259 characters, or it's on a drive without a Recycle Bin), Wander doesn't delete it silently: the rest goes to the Recycle Bin, and for those files you get a question with a list of names: “Delete permanently” or “Don't delete”. “Don't delete” is selected by default.
Replacing can be undone too. A file replaced during copying goes to the Recycle Bin, and Ctrl+Z restores both sides.