I second cereberus's warnings.

About price: I think 64GB flash drives are around 15$-30$ on Amazon. The 64GB version of the Sandisk Extreme is AFAIK quite a bit faster than some other ones, but if...

Penteract Picture Viewer 2.

You must have tried this... But maybe not? - Restart your computer?

No. As far as I know, dragging a file (exe or otherwise) over another file will just move the other file's icon.
A tip, don't delete the old version. Change it's name or save it somewhere else. That...