My work around for this problem would be as follows:
1-have no count in
2-in the first measure only have the drums play, this would be in 4/4
3-second measure change to 3/4 time, pick a 3/4 style and only have the drums play for 2-4 measures - this would be your 3/4 count in.
4-go to the measure you want 4/4/ time and F5 to change your settings
Note that you can go back and forth in time signatures many times - I just did it for 4 times.
5-either move the song to your DAW or record your part in BiaB
6-in your DAW you can eliminate the count in(s)
7-in BiaB bounce the song to a wav/MP3 and delete the measure(s) there with a wav editor - there are some good free ones like Audacity.

Just my two cents plus I'm trying to redeem myself!

Back in my day the only time we started panic buying was when the bartender shouted "last call"!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware