Thanks for looking into this. It would be nice if the description also explained that this isn’t the official DDG client.
Personally I found confusing that I could install simultaneously DDG v0.1 and v1.9, from F-Droid and Market respectively, without one updating the other. Moreover, it was confusing that the two DDG “versions” had wildly different interfaces when launched. Then I found it confusing that the F-Droid provided version was so out-dated (originally I wanted to ask F-Droid devels to update DDG), but when I checked the source code it featured the “older” v0.1 tag. At that point I was lost.
Then I thought that perhaps the two were actually different programmes, and that perhaps DDG issued an official client on the Market. That hunch proved right; but the deduction process was somewhat time-consuming and not particularly straightforward.
Anyways, I registered my complaint with the open-source DDG.