How to convert back .dat to .eml so it can be used to export to another program, emclient has crashed for the last time

have a backup from em client made this morning, then it crashed again (3 to 4 times a week) and now will not reopen and support doesn’t seem to understand what critical means… so how on earth would it be possible to use that back up (which is suggested on this site to be used to transer to another computer) to convert the .dat format to something usable to be able to import into another email program. i cannot survive with this mess any longer.

never mind this is what trash bins are for