No problem,
After reset and rescan it should take a few to finish (im sure you've realized that) anyway, See if you can do this in a different way, try the Browser to access boost 11.
- Open the Browser tab by clicking "B".
- Click on the VST plug ins tab at the very top of the Browser.
- You may have to expand a directory or two but when you locate boost 11 in the Browser
- Drag it directly to an FX bin on the track you want to use it in.
What is actually happening when you try to insert it in to the FX bin ?
Is it being inserted but wont open ? or is it not being inserted at all ?
The more detailed info the better. It might take a bit, but I believe if we work together here we can get this thing working for you. Also keep in mind, im just a Sonar user like you

.
So just bare with me. We can figure this out.