If you are experimenting or building a proof of concept, talk to our sales team to get an enterprise trial license with more capacity. You can contact them at info@memsql.com if you are not already in touch with them.
The license code looks at the capacity of the whole machine. One possible workaround, if you want to use this machine long-term with the free version, within allowed capacity, would be to run memsql in a VM or VMs on that machine that constrains the hardware available to the software inside the VM.