Recognizing openable files by MPT

[LPChip]

I had the same problem with a simple batch file I programmed.

I moved it elsewhere, and suddenly I couldn't get windows to remember to have it in the Open With list. After I removed the entry from the registry, I could select Open With, and remember, and it was added back to the list.

This is what happens:

When you request the open with list, windows will not show items that do not exist on the system (which can happen if you rename a dir).

When you want to add a program to the open with list, windows thinks to be clever and sees that the program is already on the list, thus not adding it, which will fail of course. You could of course rename the .exe file and it will magically be added to the list, or you can remove the not-working program from the list by diving into the registry and manually remove it. After the program is gone from the open with list, adding it again will work as supposed.