Hi, here my request/suggestions:
It is not clear when the app validate a link. Nothing happen when I call check function. It will nicely if there was a pop up dialog that inform the user of the progress of the operation.
Another thing is the click on an element on the treeview. I hate that appear always as I want to rename it. It would be better if rename was possible only trought the item "rename" in the pop up menu.
Finally I saw a strange bug while trying to import favorites the first time. There was some synch problem and all the times that I run the application try to conclude import operation without success. Some strange folder shown on treeview and was inpossible to delete them. I resolved it creating a new db... Unfortunately I can reproduce the bug at the moment...
For the rest, congraturation, a good tool!