Not managing to find backed up emails to restore

I have a backup but am not managing to restore. My computer crashed and I am trying to restore old emails from a C: drive synced backup. But I cannot find an .eml file in appdata/roaming/emclient it only seems to have .dat files. Surely the emails were storing themselves somewhere on my c: drive? Please can someone assist me?

See the following string, particularly my last response.