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The OP might find it useful if you could tell him/her where on the MSFS marketplace (where he/her bought the addon from) to find the contact details to the developer.
Sorry, but you got duped by a “shovelware” developer. All of their stuff is garbage. Search here first before buying anything in the future to see what people think of it first.
Captain Sim is another well known dev of questionable quality, although some people do like their stuff just for the appearance. But don’t expect realistic performance.
As a rule of thumb, any add-on plane less than $20 is either just a reskinned version of another plane or is minimally functional, especially when it comes to complex airliners.
If you want the best, stick to devs like Fenix or PMDG, but they’re not cheap.