Notepad always opened .txt files, but I changed to MSWorks after Notepad stopped working. I fixed Notepad, and want to change back to it (to open .txt files). The problem with Notepad was that the ...

Does anyone happen to know where this app is located and what it's actual executable name is? I've tried to tell windows to open .jpg's, .gif's and what not using this app, but it still uses the damn ...