Illustrator UI error
Hi,
i work in a Graphic / DTP department and for a few weeks i have problem on Illustrator UI.
Missing/ Not showing a part of tools from left, the 3 buttons from right ( minimize, maximize, close), workspace button, file menu, etc.
If i close and open again Illustrator everything works ok except the "Layer" pane not remain open.
I don't want to uninstal / reinstal Illustrator (many plugins, scripts to reload, personalized workspace), Creative Cloud app is up to date, Illustrator version is 22.1, no gpu enabled, Windows 10 PRO 64 bit.
Last program updated on my machine was Java required for internal software of my company.
Any idea what should i do?

