The provided sollutions do not seem to solve the issue. The problem lies somewhere else. The Joomla updater shows old version info. I checked the files via ftp and the version is:
<name>VM Payment - klikandpay</name>
<creationDate>January 15 2017</creationDate>
Is this a core Joomla problem. This similar problem is not the first time I see this with other plugins as well.