I'm not sure here but has anyone told you how to rename files? We can change the name (which includes the extension) in cases like this. To delete it I usually drag it to the recycle bin.
Sorry but I'm finding new computer users that were never given any instruction or classes on computers so what may be trivial might not be easy.
i was using a registered version of hypercam 2, and my laptop messed up. now, what i was recording is a .avi file and it won't play. there is another file with the same name but it's a .bak file. how do i get my avi to play? and i saw somewhere where you just "save as" the .bak to .avi, but i dont see an option for that. help please! its taking up 18GB of space that i need to clear off. (and btw no, i cannot re record what i was recording. it was a quest for an mmorpg)