when i select more files an right click open with hashtools then a eroor message is displayed for every file but not the first one. Only one filename ist loaded. This Error only occurs when HashTools ist closed. When HashTools ist openend before selecting the files an right click all runs perfectly. I have this tested with a fresh installed windows 10 and 11 Pro German Edition. It ist hashtools version 4.8.1

here the error message
An unknown error has occurred.
Failed to call CreateMutex: BFS_HashTools
Mutex already exists.
[System.Exception]
[PlN.llq]