Looking up my old Buttons with Winrar and 7-Zip Commands I found they are no longer working properly with Version10.
I know that these Buttons are no longer useful but their behaviour are very mysterious and they're showing a bug.
A simple Winrar-command like this:
@nodeselect
"/programfiles\WinRAR\WinRAR.exe" x {f}
doesn't extract the selected Archive to the current directory but to "C:\Windows\System32".
This happens with all Commands to create/extract Archives using Winrar or 7-Zip.