VirueMart missing after install

[Ash_Chook]

I'm runningJoomla 3.10.2, PHP 7.4, MySQL5.7 on IIS 7.5
When I installed Joomla I used demo template Beez & everything seemed to work ok, I went looking for other templates found one that installed as Theme-200146-j3 from Template Toaster. Looking further I found VirtueMart & installed that using the manual three files in right order process, that ssemed to go ok but when I listed templates no VirtueMart was listed??
Next I uninstalled the Theme-200146-j3 check it was gone then re-installed VirtueMart, again after installing all three packages again there was no VirtueMart template listed however the Theme-200146-j3 that I unistalled was back!! WTF?
Twice I tried this same strange result, I'm fairly new to Joomla & have no idea what is going on or how to fix this?
Has this TT Theme hacked or damaged my Joomla install or something?
Anyhelp would be greatly appreciated .

I've just noticed something thet may help, I'm now getting a warning in the template manager "invalid client identifier specified in extension manifest"

Update: Sorry! Looks like I may have solved it, after unistalling the affending TT template I browsed to the folder and deleted it off the server, reinstalled VM again and its list now so will continue to play and test if its working will close this message. thanks

[GJC Web Design]

  VirtueMart is never listed as a template .. it is a component

[jenkinhill]

The template vmbeez3 would be listed if a VM full package has been installed, but is not essential for VirtueMart to be used.