I figured I would start here before going to Support.  
I installed the new version but I am not seeing any performance gains.  In fact, it seems to run significantly slower than the 1.9.04.1 build.  I have a dual core Intel with 2GB.  TG is detecting two cores but even if I set the minimum thread count to 2, I see no improvement.  The files I have been testing do not have water so transparency rendering should not be an issue.
Originally, I installed the new version in a new folder but when I saw no improvement in render time I figured there must be some conflict with the prior version that was still on the system.  I removed both versions, reinstalled 1.9.04.1 and then reinstalled 1.9.88.1 on top and no change.  I have tried several different project files with similar results.
I assume I have made some simple mistake but I have no idea what.  
Has anyone else encountered a similar problem?
Any ideas?