Everything is fine with icons,
1 Lots of vertical lines in windows make it difficult to understand.
2 I need some kind of text hint for what this or that tool is needed
3 Blocks are too overloaded with all kinds of buttons The functionality of some of them can be combined, for example, menu buttons and add.
You can try to solve the problem with files by importing all files into the local storage of the browser and managing them already in it.