Fast Download

This thing has been happening to me more than one time a week, to be honest i couldnt know what to do next. I finish downloading a file with 889MB by using IDM but After i finish download and want to open it it prompt " ......file has been moved".
  The massage was killing me because I could find where the file has been moved. So I think and decide to go and check on IDM temporary files downloads. Final image to see the file but still can not be open.....that was another problem, check the file extension and notice has no file extension so I change file extension to .mp4 as my file was in Mp4 format while i was downloading it. And it work like waooooooh!!!!
I made it.

Allocate IDM temporary file folder

Follow the Step to Find your hidden ////File

NB:
Remember to change extension File format after see your file, then move it to any place you want