Came from forums, works on Blender 3.1
https://www.anonymz.com/?http://glukoz.gumroad.com/l/uvpackmaster3
Download Links:-
UVPackMaster_3_PRO_for_Blender_Win_x64.rar
Mirror :-
https://nitro.download/view/9DADBC1D1548B6E/UVPackMaster_3_PRO_for_Blender_Win_x64.rar