Visualizer problem

[ddllpp]

Using MX Linux 23.3 on an HP Elitebook 2760p. The Candle2 AppRun opens up the GUI, but I see the desktop in the visualizer window.
Checking OpenGL version with
glxinfo | grep "OpenGL version"
response is:
OpenGL version string: 3.3 (Compatibility Profile) Mesa 22.3.6

Trying the mesa override is closer
MESA_GL_VERSION_OVERRIDE=2.0 ./Candle2
Now the visualizer is all white with no UCS icon and nothing appears there if you open a file.
Unit I touched the colors in settings, now I'm back to the desktop again. Fustrating.

Can anyone help?

Here's the text in the terminal window:
`$ MESA_GL_VERSION_OVERRIDE=2.0 ./Candle2
locale: "en"
style "Windows"
style "Fusion"
QString::arg: Argument missing:

Candle 2
Version: 2.4
License: GNU GENERAL PUBLIC LICENSE
© 2015-2016 Hayrullin Denis Ravilevich
© 2018-2022 Patrick F.

Visit: https://github.com/Schildkroet/Candle2/

, 2.2.0
QMetaObject::connectSlotsByName: No matching signal for on_cmdRefresh_clicked()
shader program created
preparing vectors GcodeDrawer(0x55c82f98e630)
lines count 0
preparing vectors GcodeDrawer(0x55c82f98e8e0)
lines count 0

`

[ddllpp]

Solved this with the following prefix to the AppRun:
'LIBGL_ALWAYS_SOFTWARE=1 ./AppRun'
The visualizer appears all black, but there is a UCS icon and once you change the colors in settings, everything is fine.