How do I reset "open with"?

[ToddAndMargo]

Hi All,

Xfce 4.10

I just upgraded from Scientific Linux (SL) 6.7 to 7.1.
When I restored my profile, I got back all the "open with"
entries from SL 6.7.

Problem: about 3/4 of these entries are stale and I do
not intend to reinstall them.

How do I prune or just start over with "open with"?

Many thanks,
-T


-- 
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Computers are like air conditioners.
They malfunction when you open windows
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