Switching to Classic Menu and Toolbars

I'm trying out BricsCad Lite Linux v23 and want to use the classic menu and toolbars.

I will use the ColorTheme, Toolbar and RibbonClose commands to customize.

Can I just replace the v23 default.cui file with the one from v21 to complete my icon customization?

v21 Linux has been a bit unstable with menus and icons.

I would appreciate your comments. I hope to configure v23 without the v21 glitches.