I can not start frost

Hi forst team,

I had used frost in the past without problems. After a two year break
I installed the latest version of freenet and forst yesterday.

I only get as far as "initializing mainframe". Then it stops and the
program window won't open, no matter how often I try or how long I
wait.

I am behind a router but freenet works. I have to change anything for
frost to work in some config file?

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