Many thanks for this information,
igor!

Then I / we can hope, that the next update will help us!
There must be a reason, why the tray-icon of avast didn't appear and I can't open avastUI.exe.
Version 6 works very well in these points.
It's curious, that avast! said after the update, that the update went well and it shows V.7 as installed in the UI from Version 6 (before the restart) and under "Software" on my PC.
But after the restart of the PC nothing happens. That means, V.7 doesn't work.
What do you think, when we will have the new update?~SKY~