Unfortunately here's the catch - while it's probably trivial to reverse engineer enough to extract the key for the SEE database, it means that Zotero would need an SEE license to be able to handle the file still.
As an alternative it should be quite possible to produce a hook using Frida or similar that would disable database encryption on the Mendeley side so it can be imported through the usual channels. Not pretty though.
As an alternative it should be quite possible to produce a hook using Frida or similar that would disable database encryption on the Mendeley side so it can be imported through the usual channels. Not pretty though.