How to add an extension to "known file types"?

[Marcos]

.rm files still show the extension in explorer even though they open with the right player and have the right icon.

Any way to tell windows that .rm files are a known file type and its ok for it to hide the extensions?

.ra is hidden, but .rm stays shown

[Steve B]

in an explorer window, go to tools>folder options. click the file types tab, and click new. Add the extension to the list and it should hide it

Cheers,
Steve B

[Marcos]

It is already in that list though, the "file types" list

[Templar87]

i'd ask why you want to hide *any* extensions! can only cause problems and mistakes in my experience

[Marcos]

Hiding extensions makes it a LOT easier to rename files when you need to, without having to think about extensions