There is also NO REASON to reset the Windows installation or create a restoring point. Basically all is a question of the audio configuration in the Windows Control Panel / Sound Settings.
VOICEMEETER is installed on your system disk:
C:\Program Files (x86)\VB\Voicemeeter
It’s virtual I/O are installed in the system directory like any other audio driver.
Attention! After the deinstallation you need to REBOOT Windows! Otherwise a new VOICEMEETER installation will not work.
In this case, you need to de-install VOICEMEETER Virtual Audio Driver manually in the Windows Device Manager:
(1) Open the system / device manager
(2) Find any reference to VOICEMEETER Audio Device and right click on it to de-install it.
(3) Check first in Sound Video Game controller section, then afer check in audio inputs and outputs section.
(4) Reboot after each operation!
try to use VBCABLE_Setup programs to install or remove the VOICEMEETER virtual audio device – don´t forget to REBOOT after each operation.
If nothing works and you still can’t install a new VOICEMEETER version, consider making a system roll back (sytem restore) … from a recent point (some days ago).