I believe I've found the reason for this; the last version wraps the export routine in a SketchUp API construct which prevents extraneous undo operations from appearing in the undo list. This issue is apparently due to that. To defeat it, you can open
[sketchup]/Plugins/maxwell/lib/export.rb and "comment out" the following lines:
lines 81-86:
Code:
86 if Env.on_su7?
87 model.start_operation("Export MXS", true, false, false)
88 else
89 model.start_operation("Export MXS")
90 end
line 144:
Code:
144 model.abort_operation
To "comment out" means to place a pound sign in front of the lines to make Ruby ignore them (this is used for putting comments in code, hence the name):
Code:
86 #if Env.on_su7?
87 # model.start_operation("Export MXS", true, false, false)
88 #else
89 # model.start_operation("Export MXS")
90 #end
Code:
144 #model.abort_operation
Please try doing this and let me know if it takes care of the issue for you -- it does here.