*bUMP*
Its annoying but the only way I can update .xpg files is by deleting all of the groups, and re-importing them.
The only way I update .xtp files is by restarting autocad.
The other method I use to update both .xtp and .xpg is to re-import .arg profile.
I wish there was a way to (reload "toolpalettegroup.xpg) or (reload "toolapalettes") wtf Autodesk.