Have you tried fresh batteries? And watch out for those sharp battery holders, if negative holder breaks battery insulation, it would be in short circuit and burn you, or at least the meter itself.
Which firmware version? If you’re not in beta program, as far as i know, its been a while when you got updates. Many things has been improved since.. Update for “normal” users should be on its way anytime now, but if living on the edge with daily new ways to crash sounds good, then you should join us ;) (No, really its been just fine as beta tester and somebody has to take those hits from bugs, James can’t do it all by himself)