Here's a HotKey for Freeze All Ctrl+Shift+F Un-Freeze All Ctrl+Shift+U

Just run AutoHotKey32/64.exe put it in your Win Startup Menu to run at Startup.

https://www.dropbox.com/s/z4qy3ioybodeyom/AutoHotKey-Freeze-All.zip?dl=1

Add other Hotkeys or change these to what you like that don't clash with other ones.
More here Quick Action Buttons Bar & HotKeys

Code:
; Only one instance running at a time
#SingleInstance force

; Use "AHKClassFinder.exe" to find the the Progam Window "ahk_class name.
; Use "ahk_class RealBand" for Realband 
; Use ahk_class TBandWindow for Band in a Box
; When adding hotkeys use another Macro number
; To use Symbols for more multiple keys see 
; "Hotkeys (Mouse, Joystick and Keyboard Shortcuts)" - "modifier symbols" in help



;Freeze All Tracks

~^+f::  ;this is the hotkey Ctrl+Shift+F
Macro1:
WinActivate, ahk_class TBandWindow
Sleep, 500
Send, !P  ;this sends the keys Alt+P for Play menu
Sleep, 100
Send, {Down 13}
Sleep, 100
Send, {Enter 1}
Sleep, 100
Return

;Un-Freeze All Tracks

~^+u::  ;this is the hotkey Ctrl+Shift+U
Macro2:
WinActivate, ahk_class TBandWindow
Sleep, 500
Send, !P  ;this sends the keys Alt+P for Play menu
Sleep, 100
Send, {Down 14}
Sleep, 100
Send, {Enter 1}
Sleep, 100
Return


To do it on Mac use Apple Scripts or something like Keyboard Maestro.