I think ColdenDict needs some more hotkeys.
First, there should be shortcuts for every group of dictionaries (like ctrl+1, ctrl+2 etc, or configurable). Pressing these keys should change the active group, but also, if there is some search already displayed, should search the current term in this group. (btw, there could also be an option in the mouse right-click menu, like "search current term in a group" -> and submenu with existing groups).
Second thing is internal searching (within the displayed results). Now after activating the search, there are "previous" and "next" buttons, but pressing alt+n just causes writing "n" in the search box. I think there should also be a standard F3/shift+F3 for this, but now it conflicts with "dictionaries" preferences.
Third, some context insensitive shortcuts for navigating list of terms and scrolling results window. This would be helpful, becouse when there are some websites or dictionaries with links displayed, focus is of little use - it goes to every link in the page before it "gets out". BTW, the focus order might be improved a bit. Now it seems to be 1. search-box, 2. terms list, 3. groups drop-down list, 4. results window, 5. tabs, whereas more intuitive would be in the same order the elements are actually displayed: 1. groups drop-down list , 2. search-box, 3. terms list, 4. tabs, 5. results window.