Your weight is what it was 5 weeks ago, yes. If you're visually looking "better" (which should mean leaner/more definition), that's the right track.
If you don't have 100% full ROM, I'm not sure you fully rehabbed the knee, but whatever. You can do just fine without performing back squats. Like I said, Ben Bruno has a ton of info about training legs with bad knees. He had knee surgery himself, so it's even more legit. Specifically, he tends to do plenty of single-leg work, and I think he's a fan of front squats. Trying to modify a program that was designed for three-time-a-week back squats is unnecessary and ineffective.
So, exactly like the routine I linked to. (The exercises can even be superset if necessary.)