1. Please keep in mind that "opening" of the port may increase the number of peers, but not always. Apparently, the automatic port forwarding does not work on your side, so you need to forward the port manually. Moreover, not ports 4433 and 4434, but the one that is specified in the settings of the Folx - Incoming TCP port.
Please do the following:
1) Disable port randomization (Randomize port on launch).
2) Go into the settings of the router (not the network settings on the Mac) and forward there the port that is specified in the Folx as Incoming TCP port.
You need to figure out the settings of the router independently according to the manual of your router.
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