I installed this update as a result of the pop-up from running DPX17.1.

I am now on DPX 18.0.0.61642 DL x64 Mar 18 2021

I can confirm that my DXP17 custom toolbars did actually make it across to DXP18

Many other settings were also carried across.

The PDF import is a welcome improvement. I had some PDF files that refused to open in DXP17 but now open fine in DXP18.

I have now confidently removed DXP17 (I do have a backup of the DXP17 CU and LM registry files for just in)