Windows 10 File Associations

[KinnaT]

After upgrading to 10 pro from 7 pro, I switched out Notepad++ for Brackets, but the file associations simply didn't work. After manually setting them with the Windows file association dialogue, everything worked except PHP files. (Note: this does not apply to opening PHP files from within the program itself.) Attempting to open one either from file explorer or FTP (Filezilla), it would still open in N++.

After uninstalling N++ completely, it just threw an error saying it couldn't find the N++.exe when trying to open a PHP file. The only way to resolve this was to delete the following key in regedit:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\ApplicationAssociationToasts\Applications\brackets.exe_.php
Also note that the following keys are present (of which php is one of them):

These had already been set:

[mackenza]

I don't think Brackets does anything with file associations so I am not sure that the issue would be something Brackets could "fix"... or were you just posting information to let others know how to workaround the issue should they get it?

[KinnaT]

Sorry about that! I wasn't clear. Yes, this is for reference purposes.

I don't think it has to do with N++ specifically, but with Win10 being unable to unhook file extensions from previously installed software and even if the association is overwritten, it will throw an error just because it has one stored in a key.