OK, I figured it out, since you put passwords and logins in your MyEnTunnel, you leave empty fields on ApexDC++. But there's still problems.
You can connect to hubs and chat, but nothing works download/upload related, search finds nothing, get file list does not work on any user.
Best case scenario is setting Passive Mode, but this is literally useless, 1 out of 20 users Get file list works, but search doesn't, you can't find anything and users can't find you.
I don't understand what's the point of proxy feature if you are limited to no sharing, literally.