You can use the same license after system reinstall, but if you often reinstall your system on the same computer, please download and install the latest version of IDM.It has additional binding to the hardware and will not block your serial number if you use it on the same computer. Also it is always better to use the same computer name after each reinstall.
If you see a warning message about using IDM on other computers when you try to install it on a new computer, you need to uninstall IDM from all that computers if it is possible.If you are sure that IDM is not installed or will not be used on any of those computers again you can just ignore this message and continue registration.Otherwise IDM will detect that it is being used on several computers and your serial number will be blocked automatically.
If you have any problems with IDM registration because you have several user accounts on one computer and they use different IDM serial numbers,then you will need to repeat the procedure above to call IDM registration dialog for all user accounts and register IDM with the same serial number for all user accounts of one computer
A new window will open for the Registration. Fill the all details as shown in the below image and in the serial number box, copy and paste the below serial key any of them and enter in serial number box. 2b1af7f3a8