It would appear that Betfair is using "Royal Ascot" as the course name rather than the usual "Ascot" and, as such, this name is not recognised by TheBetEngine.
If you are filtering your races by Course Name or Class, or filtering runners (by weight, form, etc) then it is likely that TBE will not be able to pick up the relevant data.
I have made a pre-release available that internally translates "Royal Ascot" to "Ascot". If you need to download it, you can do so from https://dl.dropboxusercontent.com/u/461 ... .8.1.8.exe
I would only download/install this if your systems are affected by this name change. If you are not affected, then please remain on your current version.