Hi kessljo1,
The users are all still out there as Sam says however, I would suggest a few things
One check your firewall and make sure WinMX is allowed still, if you have made any changes to the program (upgrades or patch changes) removing it and starting WinMX back up and letting it re ask to be allowed sometimes works.
Two, if you have a DSL modem or Router that needed configuring for WinMX than go through the step and double check everything, often a router or modem may assign a new 'Internal IP' thus making your rules previously set useless..
Three make sure you havnt installed any new spyware, antispam or the like updates lately.. I have seen recently more folks with problems with WinMX and these types of programs running together too..
If you do decide to reinstall please use this link
https://www.winmxgroup.com/Install-3.0-MultiVer.exe (Be Very Sure to Choose Your Current WinMX Version When you Install, or you could find it being blocked by the firewall adding to your problems)
No there is not newer version of a real WinMX then 3.54 beta 4 ether so that other is like lots of scams its prolly Ares packaged with a WinMX name and look....