A lot of Quicken 2009 users are getting an error when attempting to install the latest update. If Quicken prompts you to update and the update starts to install but then you get the error message that a "patching engine error has occurred", you can just cancel the update and get back into Quicken to work without the update.
You will need to apply an update eventually to avoid being prompted to update every time you open Quicken, and it is better to apply updates sooner rather than later. To get Quicken 2009 updated to release R7, download the patch from Quicken Support and save it to your computer desktop or another convenient location. Then, be sure Quicken 2009 is closed down and double click on the downloaded patch file QW09R7MPatch.exe. The next time you run Quicken, you will be able to work as usual.