Windows 7: Need to know how to: Change properties to .sfk file back to normal

Now, I did something pretty stupid. All my .sfk files (Which help WMP open all my .mp3 .avi .wav EVERYTHING open) are changed to open with iTunes. This was a stupid mistake, and I don't know how to change the properties to default again. Anyone that knows what to do? Please, tell me all known solutions.

Default File Type Associations - Restore may help. Post back whether it solves the problem or not.

I tried to restore my AVI's and such but it says this "Cannot import C:Users\Sean\downloads\Default_AVI.reg: error accessing registry

EDIT: And other the plus side, I didn't see a restore .reg for .sfk files.. What I did was change the properties of the .sfk file, to where it's opened with WMP which causes it to be an .mp3.sfk which ruins everything..

You may need to run the .reg file from the recovery environment. First, use Advanced Boot Options to choose Repair Your Computer. Then use System Recovery Options to choose Command Prompt. In Command Prompt, navigate to the .reg file. For instance, if I saved it in my Documents folder and my Windows install resided on D: (it may reside on a different letter for you):

I'll try that later.. I'm a little stressed by all this. It's just irritating me that I made some stupid mistake, from curiosity. If that doesn't work (Which I pray it will) I might try to reinstall WMP.. Doubt that will work though..

Actually, re-installing WMP may not be a bad step. The recommended settings should revert the default file type associations back to WMP. windows media player has stopped working may be of help with the re-install of WMP.

Let's hope, I will edit this VERY reply whether it works or not..

EDIT: Damn it, it still doesn't work. And my .sfk's properties are still trying to open themselves with WMP. What's going on is I changed my properties so my .sfk's are trying to open with WMP, and WMP can't open .sfk's and for the videos/mp3s to work, the .sfk's must be at there normal, default properties.

For now, until you may think of another possible solution (By the way, thank you SO MUCH for atleast attempting to help me! :'D) I'm going to view my videos and such with windows live movie maker.. Not the best thing, but it will help me until I can fix this.

What was the default program for the .sfk files? I did a Google search, and I come up with Sony Vegas or Sound Forge...

It was Sony Vegas I believe. Well.. I think. Why exactly?