Application version did not change after applying a roll-up for Dynamics AX 2009.

After applying a roll-up to Dynamics AX 2009, the application version did not change.  Only the kernel is showing the correct roll-up version.  There were no errors during the install. Cause: Dynamics AX 2009 Server configuration is pointing to an application folder that is different than the original installation folder path. Resolution: 1.  Check  the InstallDir key under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Dynamics\5.0\Setup in registry and verify application file location in the Dynamics AX server configuration is also pointing to same path.  Dynamics AX rollup will only update the application folder defined in the InstallDir Key in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Dynamics\5.0\Setup    If the path here is different than the application file location in your Microsoft Dynamics AX Server configuration utility window, then the workaround is to temporary update the path in this registry key to be the same as the application file location in the Dynamics AX server configuration. 2.  Review the DynamicsSetupLog.txt file created during the install of the rollup.  Look for the path for this property - InstallPath.  The DynamicsSetupLog.txt is located here by default on the machine you installed the rollup on - C:\ProgramData\Microsoft\Dynamics AX\Dynamics AX Setup Logs\YYYY-MM-DD HH-MM-SS  (with a folder containing the date and time you ran the install).  The InstallPath property in this log file will confirm the path of the application folder where the rollup was applied to. 3.  To verify the application folder version - Go to the folder listed in the DynamicsSetupLog.txt (in step 2) and locate the axsyp.version file.  Open this file in a text editor like notepad.  This file will contain the version of your application folder.