Windows sync fixed (firewall problems)
I made a quick guide on reddit. But I will make a more detailed guide for both windows and ubuntu in the next few days.
I know good guides are missing but I will work on it. All help and suggestions are appreciated!

https://www.reddit.com/r/pepenet/comments/16bm0bd/solutionfix_for_windows_sync_firewall_problems/

As a side note: It's good to follow the reddit and wordpress pages if you want all info at all times. I know that this sounds cheesy and like self-promotion but some things are just posted on one platform. I try to keep up with everything but I might forget to publish that I made an update somewhere. Do it only if it helps you, don't do it for me.