AdiIRC

For the Treebar issue, adiirc might have been closed with the treebar off at some point, the layout is only saved on successful exit, force closing adiirc would not save the new layout. Try start adiirc, enable treebar, close adiirc, then start it again.

I don't think it's frozen, next time, try to right-click the systray icon and use the "Show" menu, if that doesn't work, try disable minimize to systray.

Are you using the 4.3 beta? there was some related fixes there.

Yes I am on 4.3 beta

Currently it is blocked again, I go to the systray menu by clicking on "Show", there is nothing.
You have to go to device manager and killer, there is only that to do.
And the "Treebar" will leave too, we'll have to put it back! Let's look!

It should be noted that when I click on "Option" the options window is displayed

Oh actually it's good it's back.
I clicked on "Option" and I closed the options window and then I click on the systray to display AdiIRC and it's good.

Good to know, I’ll look into this for next beta.