Yes, definitely stay with the version that's still working. I just wanted to point out that the 2019 Toolbar version you referred to is the same as or similar to the tool bar I had posted called: Modify
Also notice that when you enter the following commands:
Command: -TOOLBAR
Enter toolbar name or [ALL]: Modify
AutoCAD responds with the following options:
Enter an option [Show/Hide/Left/Right/Top/Bottom/Float] <Show>:
As I've already talked about what Show does, there are the additional prompts like: Float
This will cause the specified toolbar in this case the Modify toolbar to move from a docked position that may not be seen to a floating location on the drawing screen.
Now you can drag this Modify toolbar to a different docked right, left, top or bottom location on the drawing area.