Windows: If you’re looking for a quick and dirty way to create temporary file associations while using your portable apps on a computer, Portable Extension Warlock makes it easy to open files with the apps you want.
Portable Extension Warlock (PEW) provides a great middle ground between permanently altering the associations on the computer you’re using (not feasible and/or polite if you’re using an internet cafe computer or a friend’s computer) and having to open each individual file in the portable app itself (slow and nowhere near the click-and-load experience you get at home). PEW does two things: first, it helps you create a database of file extensions associated with portable apps on your USB drive. Second, it creates a temporary drop zone on the screen where you can drag and drop files. Any files dragged onto that little drop zone icon will launch with PEW’s alternate set of file extensions.
It’s not a perfect solution in that it doesn’t completely recreate the experience of double clicking your file and having it open in the application you want, but given the limitations of using a non-administrative account and respecting the file permissions already set by the computer’s owner it’s a great work around.
Portable Extension Warlock is a free tool, Windows only–requires Microsoft .NET Framework be installed on the host computer.