I reckon you'll knacker the flexy panel if you try to peel it off but given the panel is five years old you're probably on borrowed time with it already.
That said and the pop top weathering being the bigger issue I reckon you're going to have to try and remove the flexy panel, get the whole roof wrapped and hope that you didn't lose your rag with the panel and there's enough of it left in one piece to reinstall.
If it helps I've just been T Cutting my roof and rewaxing it this week and looking at my stuck on solar panels I reckon I might as well have used Blutak or drawing pins, I know one of them's going to make another bid for freedom this summer.
