As shown in the red circle, half of those icons are outside the GUI margin.
Fresh install Seafile Client 6.0.1 on a fresh Win10, running in a surface book.
This doesn’t look like a general problem because I don’t see it on my desktop.
Identify the cause.
It happens if and only if the text size scaling (in the Display Setting) sets to > 100%. In my case, the surface book uses 200% scale and has resolution 3000x2000. If I set the scaling to 100%, everything looks normal.
Hope the next client version could look better in the high DPI screen 
Wouldn’t mark this as solution. It’s clearly a bug 
Sure