Trane XE90 cycling, need to clean flame sensor but can't open

Hi, I'm new to the forums. It's pretty humid where I live, getting pretty cold now too. We recently started the furnace back up, and it worked fine last year. Now it is cycling. This seems like an issue with a dirty flame sensor, but I can't for the life of me figure how to get the control access panel open. I made a video showing the access panel and screws. I tried those screws shown in the video (3 on left, 1 on right) but they didn't help the access panel come out. I don't see any other screws, and the instructions I find for the XE90 say to loosen four screws to open it. Thanks for your help. https://www.youtube.com/watch?v=Ha8fh8lxB_4&list=UUeiXujXHoChs1pL8oPA8LtA