saves both auto and manual are stored to *game*\game\saves folder so by copying folder where your renpy games are to new computer you can continue playing.
if ch4 gets some updates then ends early next year. most of open plots could be solved in 1 update but my guess is at least 2 updates.
Ada is definitely described during the game as being underage and, assuming the game in set in the US that would put her age between 15 and 17, dependent on the state. Even then there are acceptable age differences allowed in each state so her doing it with any guy twenty years plus her senior, let alone her dad, would be a no-no. That being said, there are evidently facilities available to "fix" genetic issues with pregnancies so who knows what else is different.
What I'd like to know is why? What's the point of taking a game like DMD and then wanting an un-incestify patch.
You save at the end of C1, that will transfer at the start of C2. At the end of C2 you will have to take notes of your relationships and points values and manually insert them at the start of C3.
