I have been running Multiplicty 2.0 for years, but recentlyy upgraded router and for some reason could not get it to work again. Have 1 win7 computer, 2 win 10 and 1 xp. All worked great until router change. So I purchased the newest version a couple of days ago, It sees the win 7 and one of the win 10, but after hours of work still won't connect to the other win10. The win 7 is the primary and even with the the one it does connect to, mouse movements very erractic, just wanders across the screen on it's on.  So thinking the win7 is the problem. 

So my question is what is the latest version that offers win7 compatibilty and how do I get it? The new version only one offered.

TIA