I just experimented. If I close the mixer (little "X" in upper right hand corner of 'mixer', kinda faded 'til you mouse over it) before closing the program, then, when I reopen the program, the mixer is not open.

Hope this works for you.


(Fender) Squier Vintage Modified '70s Stratocaster
Roland AC-60
Intel i7-7800x @ 3.5GHz, 16 GB RAM, AMD Radeon RX 580, Windows 10 Home 64 bit
Focusrite Scarlett 2i2 with Pro Tools First, BIAS Amp2, Bias FX Pro and BIAB2019 on dedicated 500GB SSD