Support & Update addon
It's required to have ACTIVE support & update addon to able to update to latest version of the extension
In some cases even if you have ACTIVE addon, update may fail due to buggy version.
Please delete the extension files and re-install the new version. Your settings will remain intact.
Delete Path:
For Virtuemart Gateway
/plugins/vmpayment/extension_name
For Component
/administrator/components/extension_name
For Module
/modules/extension_name