How do I reset "open with"?

[ToddAndMargo]

On 10/01/2015 11:38 PM, Sébastien wrote:
> le 2015-10-01, ToddAndMargo écrivit:
>> 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.
>
> The entries are located as separate .desktop files in
> ~/.local/share/applications
>

Hi Sébastien,

That is a list of all my .desktop's.

What I am after is when I am in a file manager, right click
on a file name, select "open with", how do I get rid of
all the stale junk?

Many thanks,
-T