Is it possible to repload frequency save into Maytech remote that was left discharged for too long?

Hi forum

I hve a Maytech/Steez remote that was left without use for at least a year and the battery got depleted. Maytech warned against leaving it without a charge for longer than 3 months saying the frequency save will get deleted in the remote, and thus you wouldn’t be able to connect it anymore.

I’m not getting blinky channel light indicators following the manual

Does anyone know whether I could access the remote somehow and check this?