Can someone identify the following file extension to which program?

avi.sfk0
avi.sfk0
avi.sfap0
upd
dvp

i have been trialing different programs until i plumped for Sony vegas and i think the above files are ULEAD or Power Director...???
They are obviously some sort of avi files - if you d/click on them Ulead starts to open but then it says file format not supported.

I need to delete all files that associate with Power Director, Ulead & Serif Movie Studio 4 - i seem to have identified most (I know i should have made sure which file opened with which program b4 i uninstalled!!)
But i will be retaining all the purely avi files.

but any help will be appreciated!
Thanks

.sfk and .bak files are Vegas files.

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Thanks for this!!

Yea, I think a .bak is an automatic back up of a project and a .sfk is something vegas produces when you import a clip to edit and seems to appear in the fodler with the video.

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yeah i think the sfk files contain what edits it does to the files, so it opens the avi, then the sfk to do the editing, i think, to test this (i dont have vegas anymore) open up vegas, edit a video peice real quick, and save, close vegas, delete generated sfk files, and open up vegas. im curious now...

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