You may use the following command lines to remove items offered by Bandizip from a context menu in Windows 11.
get-appxpackage BandizipShellext* | Remove-AppxPackage
"C:\Program Files\Bandizip\data\RegPackage.x86.exe" /unreg BandizipShellext2
And you may use the following command line to register Bandizip items in the context menu again.
"C:\Program Files\Bandizip\data\RegPackage.x86.exe" /reg "C:\Program Files\Bandizip\data\bzshell.x64.msix"