Bottom Slide wiper/seal help!

[Papat110]

So I have a 2016 SE25 Cruiser Aire Fifth wheel. Noticed part of the bottom slide seal rubber hanging down and torn. I have never replaced a bottom seal. Watched a few videos but on mine I have a hard plastic piece going the length of the bottom slide with the screws holding it. Removed the screws but I still can’t get this hard plastic piece to come off. I’ve tried to pry it loose thinking it was probably stuck with a two sided tape. But it won’t budge to the point I’m afraid I’m going to break this piece. Any help from someone that has replaced this bottom seal before. I’m not sure if this plastic piece also goes up under the bottom of the slide floor. As you can see in the picture where the screw is removed; this is the part I can’t get to budge. Part of the rubber wiper is hanging down on the right. Help!