I'm running BIAB 2016 on a Windows 10 machine, and using the on screem metronome feature.

New files are not a problem. But on existing files the measure count is off by 1 beat.
The “count in” is correct. But, after the count in, beat #1, in measure #1, displays on screen as beat #2 rather than #1. This condition persists throughout the song file.

I had this issue some time ago, but cannot find my notes describing the corrective action. Can anyone help? Thanks, Jim

Is this a Biab problem or RB?
You mentioned Biab 2016 on Win10 so thought I'd ask.
If Biab (and not RB), maybe the BiaB forum would yield better results.