Even if you do not use Bandicam at the same time on 2 different computers, you must purchase a 2-PC license to use it on two devices. If you want to use a 1-PC license on another computer, you must either uninstall the existing registered Bandicam or purchase another license.
If you uninstall/unregister Bandicam, format your computer, or your computer is broken, you can re-use/transfer the license to another computer. (We highly recommend you unregister Bandicam before formatting.)
Go to https://www.bandicam.com/buy/ and enter the email address used for purchasing the license in the "Resend Purchased License" section. The license will then be sent to your email again. Please send your payment receipt to bandicam@bandicam.com if you forgot or cannot access your email address. If you don't have the receipt, you must repurchase the license.