Hello @jkellerer
First of all apologies for the issue that you are facing with the plugin. Hope you had a backup from where you were able to restore the users. If you need any assistance in restoring the users back, then do let us know.
Second I would like to get to the bottom of it so that if there are any bugs in our code (or ambiguity in the documentation) we could fix it. So please give me more details about the following.
– Which module did you use to delete the users
– What options and filters you selected to delete the users.
Once again thanks for reporting this issue and apologies for the inconvinence.