RH-6 : Can no longer get new TOOLBARS created in previous session

I Can no longer get new TOOLBARS created in previous session , and Menu Tab sizes and positions no longer hold from session to NEXT session .
ANY suggestions ?
RH-6 on
Windows 10.0.0 SR0.0 or greater (Physical RAM: 32Gb)
Computer platform: DESKTOP

Standard graphics configuration.
Primary display and OpenGL: NVIDIA Quadro M4000 (NVidia) Memory: 8GB,
Driver date: 10-18-2023 (M-D-Y).
OpenGL Ver: 4.6.0 NVIDIA 537.70
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0
- Secondary monitor attached to adapter port #1
- Secondary monitor attached to adapter port #2

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On

Anti-alias mode: 8x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 10-18-2023
Driver Version: 31.0.15.3770
Maximum Texture size: 16384 x 16384
Z-Buffer depth: 24 bits
Maximum Viewport size: 16384 x 16384
Total Video Memory: 8 GB