Can't download the file via DropBox as it's over 2GB and shared in a way that requires it be added to DropBox.
Assuming it is uncompressed (based on the file size), It should compress to a much smaller size if you zip it. I think sharing the file itself, rather than the folder it is in, should also let us download it directly.
A DebugView log as per the Crash, exit or high CPU when right-clicking certain files "Finding the Culprit" steps may also identify which shell extensions is causing the delay. (The ProcMon log will still be useful in working out why the delay is happening, while the DebugView log is the quickest way to work out which extension is triggering the problem.)