In response to a suggestion in another forum (https://support.gengo.com/entries/21495931-Option-to-search-through-jobs), I created a tool for downloading completed jobs so you can search how you translated certain details in the past.
Visit http://rumpelstiltskin.appje.nl for a detailed description of the tool and instructions how to download and install it, and be sure to read Gengo's stance on 3rd party development (https://support.gengo.com/entries/55412060-Gengo-s-Stance-on-Third-Party-App-Development) before using this tool. Gengo is not affiliated with the app, though they did test the current version and favor this initiative.
The tool is Mac only. I'm aware that many translators use Windows, but one has to start somewhere, and given my background in programming this was the most sensible first step. If I find a way and enough time to make a similar tool for Windows, I will.
I hope this is helpful for some of you.