Ok Lucky,
First, make sure that your computer is set up to show all folders, you can do this by typing "Folder options" into Help and Support". When you have done a search for it, the No 1 option is "Change Folder Options" click that, then "Click to Open Folder Options". That will bring up a panel called unsurprisingly Folder option, which has three tabs, General, View & Search. Now click "View "from there you will see "Hidden Files and Folders", now put the tit in "Show Hidden Files, Folders and Drives", Click "Apply" (you can leave this open and change it back when you've finished if you so want"
Now go to the address "C:\Users\(Your name here)\AppData\Roaming\Lockheed Martin\Prepar3D" where you will find the dll file which is an XML document, you need to right click this and open with Notepad and add (after making a backup):
<Launch.Addon>
<Name>SibWings service module</Name>
<Disabled>False</Disabled>
<ManualLoad>False</ManualLoad>
<Path>SibWings\Service\swservice.dll</Path>
</Launch.Addon>
Here is the entry from my dll file, showing it's relationship with the entry above it (for FSUIPC in my case, yours will probably be different). Note the "Launch Addon entry is repeated at the top of the SibWings entry (slightly different for the end of the entry & the beginning of the next one) and the </SimBase.Document>
</Launch.Addon>
<Launch.Addon>
<Name>FSUIPC 4</Name>
<Disabled>False</Disabled>
<Path>Modules\FSUIPC4.dll</Path>
</Launch.Addon>
<Launch.Addon>
<Name>SibWings service module</Name>
<Disabled>False</Disabled>
<ManualLoad>False</ManualLoad>
<Path>SibWings\Service\swservice.dll</Path>
</Launch.Addon>
</SimBase.Document>
I hope this doesn't sound to complicated as I've tried to explain it the best way I can, maybe others could have done a better job of it, but if you follow it step by step it should work ok, let us know how you get on!
Hope this helps.
Regards,
Ian.
P.S if you haven't got a dll file in your Prepar3D folder, simply copy the one from the FSX folder.