There is a few (cosmetic)bugs in the Import configuration dialog
Maybe not super crucial, but because you seem to care about professional look of your app, probably worth fixing, to give users better experience.
1)If you switch to Site Configuration, resizing window doesn't resize content (but it does work in other 2 "tabs" Email configuration and Preferences
2) Under Site Configuration> any site> In some sites its called "Directory Configuration" in others its "Directories Configuration"
3) If you compare Everest and Entraction configuration panel, the Directories Configuration "square" changes shape. A couple of sites have different dimensions of that square. (talking about canvas that shows Hand history folder once you select it)
4) For some sites it says Hand history Directory under "Directory Configuration" like in PokerStars, some sites don't have any text (OnGame for example)
5) Preferred seating under Pokerstars has its own section, while in Winamax it's under Options. (also different atleast for Ongame)
6) Preferred Seating pulldown menu is taking whole width under Pokerstars, but it's way shorter for Party, Microgaming, Merge, Cake and 888