A couple of new features in v2 are:

Drag a screenshot: You can now drag screenshots directly from your screen, and upload them as you release the mouse button!
Upload multiple files: If you copy multiple files from Windows Explorer, ClipUpload will upload all of them, and copy all the generated links!
Faster UI: The UI has been streamlined completely, so it works even faster than previous versions!
Better progressbar: The progressbar has been optimized, and is now working better than before.