Application associated with an extension is not "sticking"

[RBeatse]

I just recently changed my OS to Win 8.1 (from Win 7) and a java application I have (*.jar) is pointing to Python to open it. THis is obviously wrong. If I download the latest version of Java and install it, the icon changes and the app works great. The "jar" externsion is associated with java. When the PC is rebooted a few days later, the icon is now the Python one and "jar" is now associated with Python.

How can I get it to "stick" that *.jar is associated with Java?

Thank you.

 

[ectech]

You will need to clear the Value Data for the PersistentHandler subkey.

This reg file should do it. Make sure you sign out/in to apply the change.