No, there aren't any other ways - you just have to updated everything like I said earlier. That includes the date service and the client (Silverlight app), not just the data model. For example, in the BookCategoriesDataService.cs the "Tags" entity set is exposed and if you have removed the Tags table from the db, you'll have to remove them from there as well.
Most importantly, you have to update the Silverlight application, because it's looking for the fields you have removed. First find the service reference under Service References and update it. Then you have to update the project so that it compiles again by deleting or changing the code that uses the removed fields.
And in general, if your app doesn't load or crashes or does anything unexpected, the best thing to do is debug it and locate the problem, or at least the code that is causing the problem. Then you'll have a better idea what to do next.