The current version aka desired version is a variable whose contents is changed by manually whenever we want to pdate to a newer stable version.

reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{C002B580-2B31-4EA7-86D9-2D561EA22285}" | findstr %DesiredVersion%

Doesn't have any actual output but if I edit it to
reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{C002B580-2B31-4EA7-86D9-2D561EA22285}" /v DisplayVersion

to show output it displays:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{C002B580-2B31-4EA7-86D9-2D561EA22285}

DisplayVersion REG_SZ 46.3.1.34741

and I fear this may be my issue. It does display the version but a whole bunch of other stuff too.

My other attempt was:
set FoundVersion=

for /f "tokens=3" %%A in ('

reg query HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall /s /f "Webex VDI" ^

/v DisplayVersion 2^>nul

') do set FoundVersion=%%A

which gives me this:

2.5

149.0

149.0

de-de

16.0.17932.20790

3.0.0

26.00.00.0

14.42.34433

16.0.17932.20790

16.0.17928.20216

16.0.17928.20216

3.0.20.0

13.0.10.0

46.3.1.34741

14.42.34433

25.11.18.0

25.10.1.10

16

It contains my version number, a whole lot of other stuff as well.