Replacement Hardware?
This issue could either be with the hinge or the operator. The best way to verify is to remove the operator and then try opening and closing the window by hand. If it still hangs up, then you need new hinges. If it works just fine, then you need a new operator.
In all likelihood, it's the operator that's broken. Being able to open fine but then struggling to close is symptomatic of a stripped gear.
Try the experiment I described and get back to me. If it is the operator, then show me a photo of yours removed and I can check our records to see if we sell a good match.
Gotcha, thanks for checking that. What you're showing here is the slider on the hinge. These aren't sold separately so you will unfortunately need to replace the entire hinge assembly.
I believe our 36-048 will work for you, but only if the base track is 10" long and only if you replace the top and bottom at the same time. As long as those criteria are met I'm confident that it will work for you.