hi @networktest33 , you'll be fine to remove the MR33 from the Network it resides in and replace with the MR36. The licence will continue to tick along. If on co-term this will most certainly be the case. If on PDL then you may have to un-associate the licence in use and then apply to the new AP. You won't have to buy a new licence.
Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/
I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.