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how to backup radial menus in houdini?
you need to find the radial menu folder, the default path is something like this
C:\Users\[computer_username]\OneDrive\Documents\houdini19.5\radialmenu
copy files in the path that ends with ".radialmenu" into a safe location.
if you need them on another pc copy them back in the other device radial menu folder
and houdini will add them in the next time you open it