Associate This

Associate This is a comprehensive file extension manager provided by Spearit Software. It is compatible with several versions of Windows OS and requires minimal hardware resources to work.
It’s a nice utility that can protect all your files from being misused and misattributed by any other program without your knowledge.

It displays all the task lists on its main interface, to give you easy access to common commands. Under these task lists, you will find lots of features like an association monitor, an open tracker, a shell extension manager, an association detective, and task and extension lists. With the help of these features, you can have full control over file associations and easy access to tasks related to file association management. Also, you can find alternative associations that exist on your computer, use backup and restore facilities, and many more.

You will be able to configure the program's behavior (e.g. prevent a particular program from changing associations, get notifications when an association changes) according to your needs. You can also modify the performance of the program regarding a particular file extension with the help of File Extension Configuration Options. With all these facilities, the tool will really serve its purpose.