One of the great features of MSFS Addons Linker is the ability to start any programs you want along with the sim. MSFS Addons Linker for Microsoft Flight Simulator | MSFS
Under Tools > Options > Additional Options you can add them. Here’s mine for reference:
May be overkill if you don’t need the other main feature of the tool (enabling/disabling addons and not having to put any of them in your Community folder directly) but it’s always worked like a charm for me, so it might be an option.