DiffMerge is my all-time favorite visual diff tool, with 2 fatal flaws that upset me so much... 1. Unable to edit text on the left side, only the right. >.< 2

DiffMerge is my all-time favorite visual diff tool, with 2 fatal flaws that upset me so much... 1. Unable to edit text on the left side, only the right. >.< 2. Related to 1, unable to simply paste two pieces of text into two views and compare them, the way you could on www.quickdiff.com. You have to manually create 2 files each time. So sad, because it is so good in all other ways! And it's not open source, so I can't step up and contribute. :(