Signal fire?? – Stormfall: Saga of Survival Review

I’ve only had the game a couple of days but I really like it. The builds are fairly easy and the tasks are challenging but doable, well done. The only problem I’m having is with the signal fire. I can find nowhere online that describes how to upgrade it. Even the admin on your FB page simply said “you don’t”. It’s quite clear that not only CAN you upgrade it, you have to if you want to access anything more than remedial gameplay. Can someone from the development team please explain this process? Thanks in advance for the help.
Review by fiveonfive on Stormfall: Saga of Survival.