New update 1.5.3.4 available here
ATTENTION
REQUIRES SERVER & CLIENT VERSION 1.5.3.1 or newer - NOT COMPATIBLE WITH ANYTHING BEFORE 1.5.3.1
For the server you need to open TCP PORTS 5002 + 5003 unless you’ve changed the server port using the server config file.
Banned IPs are added to a file created where ever the server is run called banned.txt. To unban, just delete the IP from the file and restart the server.
The server will always open TWO TCP ports - one you can control with the Config file, the other is always +1 above the setting in the config. If you cant press PTT but everything else looks fine - this is why 
INSTALLATION INSTRUCTIONS
To install or update, extract ALL the files from the zip into a folder and just run the installer which’ll replace any previous version installed automatically
.NET version 4.6.2 Required - PLEASE INSTALL THIS - https://www.microsoft.com/en-gb/download/details.aspx?id=53345
If you’re on Windows N edition (No media components installed) then install this (you’ll know when you get the audio initialisation error!) - Media Feature Pack list for Windows N editions - Microsoft Support
KNOWN BUG: If you get lag while using the radio, press L Ctrl + L Shift + L to fix. This is a DCS bug i’m trying to work around and triggered by pressing L Ctrl + L. It doesnt matter if that key is bound or not, it’ll still cause lag when you press it