The user-written commands you download to your ado/plus directory are updated once in a while on that RepEc server they come from. So, after you findit and then net install it, your imported command might need to be refreshed occasionally. That is what adoupdate, update does.

I was reminded of this when I tried to run freduse today. Actually, the problem that reminded me of it -- a "not found" error message thrown when the command invoked the Mata function _fredifinparse() -- didn't go away, but "adoupdate, update" is still a good thing to do. What did fix _fredifinparse() is described here.