I've purchased VirtueMart Updater and installed the module. There were some difficulties with the module's installation in my e-shop and with usiung vmart viewer by my clients.
I applied to the support service of VirtueMart developer and they helped me within 5 minutes.
Also I understood why i had such problems-I hadn't read their instructions on the site carefully. The app is very convenient because it allows not only manage vmart,it also allows your clients to look through the shop using a free app.
The app is very stable, having tried a couple of the same apps (i-shop),I should say they work awfully.
During this month there were 2 updates of the vmart, I'm waiting for their vmart administrator,they promised to release it by February, 1.