HOW TO RESUME BROKEN DOWNLOAD IN INTERNET DOWNLOAD MANAGER(IDM)

1. Open the same file in the browser, click to download it again, when dialogue window appear select to "download it later". (Check to ensure that the file must have the same file size and from the same link/server).
2. Open IDM manager window and double click the file you have selected to "download later" 
3. Select the full address field and press ctrl+c to copy to the clipboard.
4. Now, double click the file which has not been resuming and paste the address there which you have copied earlier in the address field press ok.
5. . 
6. In the IDM manager window click the file and press resume. 90% of the resuming problems has been resolved by this little tip and trick.