Credits for life long subscruption

How can I use my credits for purchasing the one time subscription? I get a discount when paying for the normal subscription, but it did not work with the other one. Can you tell me how to do it or can RemNote add the feature if it does not work yet?
Thanks for help!

Hello has it been resolved yet?
I am thinking aboout putting the effort in to get enough credits for the lifetime subscription, but if it does not work then i won’t bother.

have you tried it yet?