Are you sure you really downloaded it again? Windows has a nasty habit of just pulling the file out of some obscure temp folder and saying \"Ta-da! Look! I just downloaded this 100mb file again in less than 0.00432 seconds!\"
To bypass this, delete all the content from your C:\\Windows\\Temp and C:\\Windows\\Temporary Internet Files folders (you should do this regularly anyway).
Then download the run_me_first.bat file again, place it in the folder with all your .part files and try it.
Hope that helps
