I finished the first chapter of the game and the achievement does not appear

Where are the game files saved? I want to move my progress to a different computer. I've tried looking through my AppData and Registry but haven't found anything. It's possible that I missed it.

One column is 9 6. This is impossible in a 15x15 square; there has to be room for a blank square in between the two numbers.

it would be very nice to have an option to automatically fill in Xs when a row is complete

finally another decent-looking nonogram without all the ♥♥♥♥♥♥♥♥ (mistake counter, timer, etc.), at least based on the trailer and screenshots, but I was wondering if it works on win7 despite the store page only mentioning win10.