Hi @Larx,
I use a Raspberry as a homegear and homeassistant server; they work well and communicate well with each other after the latest homegear changes.
I tried to install Homematic-manager on a computer with Windows; as you could see from the log, a communication with homegear begins, then everything stops. I checked the windows firewall and it looks fine. I would like to ask you if it is possible to send me your homegear configuration files (of course you can obfuscate ip addresses or other sensitive data) so that I can compare with mine; eventually I will try to run homematic-manager on a computer with linux.
Thank you
Michele