/mt fellow quit causes error

[Starcrusher55]

every time I do /mt fellow quit ....
<{Mag-Tools}>: Exception caught: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Decal.Interop.Core
at Decal.Interop.Core.ACHooksClass.FellowshipQuit()
at Decal.Adapter.Wrappers.HooksWrapper.FellowshipQuit()
at MagTools.PluginCore.ProcessMTCommand(String mtCommand)
at MagTools.PluginCore.Current_CommandLineText(Object sender, ChatParserInterceptEventArgs e)
8:34:39 Unknown command: mt

Happens on ACE and GDLE, latest version of Magtools

[scorpuk]

Same issue with /mt fellow disband:

13:17:18 <{Mag-Tools}>: Exception caught: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Decal.Interop.Core
at Decal.Interop.Core.ACHooksClass.FellowshipDisband()
at Decal.Adapter.Wrappers.HooksWrapper.FellowshipDisband()
at MagTools.PluginCore.ProcessMTCommand(String mtCommand)
at MagTools.PluginCore.Current_CommandLineText(Object sender, ChatParserInterceptEventArgs e)
13:17:18 You have disbanded your Fellowship.
13:17:18 Unknown command!

Even after clean reboot.

Thsi is on Reefcull