I again
cannot Reply
to my own threads { 351616, 355160, 355257 }

Threads older than 60 days will be closed automatically. Without a working forum search it's impossible for us to keep track of things in older threads, so the idea is to close them after the matter was resolved or after inactivity. Regarding client development, most of the things you suggested has been added to our bugtracker.

If you add exactly this message about that thread was closed, then everyone is clear that cannot reply is OK.

In game 26705538 I was SICI, I did elite serjant, in added icon about it in castle (like in queue - that is wrong i guess), then I pressed first crusade, did research, and - nothing, all vils stayed as vils. That is error I guess.

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In past I did with BOHE chemistry - same thing - added icon about it into Uni like in queue, then I could press research Houfnice, but - nothing, it stayed cannons, didnt up to houfnice. Error I guess.

You are confusing First Crusade with Flemish Revolution. The second one is a burgundian technology that turns villagers into military. First Crusade enables free serjeants in the town centers
The upgrade is working fine. Please, check again.