This is that you need to put in the RoboMX 2.7 and up w/Metis. It goes in the RoboMX.ini file, and you need to find the old ones listed in there.
[PeerCache]
Count=29
Server_000=cache0.winmxworld.net
Server_001=cache1.winmxworld.net
Server_002=cache2.winmxworld.net
Server_003=cache3.winmxworld.net
Server_004=cache4.winmxworld.net
Server_005=cache5.winmxworld.net
Server_006=cache6.winmxworld.net
Server_007=cache7.winmxworld.net
Server_008=cache8.winmxworld.net
Server_009=cache9.winmxworld.net
Server_010=cache0.winmxcache.com
Server_011=cache1.winmxcache.net
Server_012=cache2.winmxcache.com
Server_013=cache3.winmxcache.net
Server_014=cache4.winmxcache.com
Server_015=cache4.winmxcache.net
Server_016=cache6.winmxcache.com
Server_017=cache7.winmxcache.net
Server_018=cache8.winmxcache.com
Server_019=cache9.winmxcache.net
Server_020=cache0.winmxconex.com
Server_021=cache1.winmxconex.net
Server_022=cache2.winmxconex.com
Server_023=cache3.winmxconex.net
Server_024=cache4.winmxconex.com
Server_025=cache5.winmxconex.net
Server_026=cache6.winmxconex.com
Server_027=cache7.winmxconex.net
Server_028=cache8.winmxconex.com
Server_029=cache9.winmxconex.net