I was reviewing my Bandicam, trying to find instructions on the registration, so I thought if I tried looking for the registration instructions again, it would already know I made a purchase. But it turns out I just made a duplicate purchase by accident. Is there someway I could get a refund on it?

Hello,

If your serial number has not been registered, we will refund you within 14 days of purchase.
For refund inquiries, please contact bandicam@bandicam.com.

Hello,

If your serial number has not been registered, we will refund you within 14 days of purchase.
For refund inquiries, please contact bandicam@bandicam.com.

Will the lifetime key be valid for all future updates?

Hello,

A lifetime guarantee is offered as long as the below rules are followed:
https://www.bandicam.com/faqs/license-plans/