I check it again and you are right, I havent installed this version. Now everything works perfectly, thank you so much! :)
But last question... can I uninstall GadgetBridge and have still czech language in MiBand3?
I finished last step and my MiBand3 is writing me "connect to app to update" ( in czech of course). But in app GadgetBridge is written that miband is connected. I dont know what to do.