Thank you for this wonderful tool. I use it everyday.
Here is a bug I found it in the latest version (v1.147.02). If open more than two files and have them docked, when right click to open context menu on an item, then move the mouse pointer on the context menu, all menus could disappear. So I have to go back to use the old version 1.146.03. My Os is win 7 64 bit.