Hi coba
When you opened the media version of the variation to watch it, and assuming you're using "Quicktime" then it would have been loaded onto your machine into the "temporary internet files" folder as a file named "variation.mov" (i'm assuming you have Windows 2000 here)
It would have stayed there, but unfortunately, if you've viewed the new mambo variation, it will have been over-written.
If you've not watched the mambo, the waltz is still on your machine