Unable to upgrade to 7.6

I've just posted this under the 'Start a discussion' area but have just spotted the 'Report a problem' area - apologies for the duplication.

Hi - I am experiencing issues updating to 7.6 from 7513. The steps I am undertaking are as follows:

1) Stopped SD service using the shutdown command. This doesn't work for me and the server seems to automatically restart itself. I receive the following in the wrapper.log file:

ERROR | wrapper | 2011/01/06 10:52:31 | JVM exited unexpectedly.
STATUS | wrapper | 2011/01/06 10:52:35 | Launching a JVM...
INFO   | jvm 2    | 2011/01/06 10:52:36 | TRYING TO STOP DB WITH COMMAND:::stopDB.bat ../mysql 33366 root
INFO   | jvm 2    | 2011/01/06 10:52:36 | This evaluation copy is valid for 29 days
INFO   | jvm 2    | 2011/01/06 10:52:54 | ServerContainer                                   [CREATED]
INFO   | jvm 2    | 2011/01/06 10:52:55 | AdventNetCC                                       [CREATED]
INFO   | jvm 2    | 2011/01/06 10:52:57 | SQLOne Search                                     [CREATED]
INFO   | jvm 2    | 2011/01/06 10:53:10 | AdventNetServiceDesk                              [CREATED]
INFO   | jvm 2    | 2011/01/06 10:53:10 | ServerContainer                                   [STARTED]
INFO   | jvm 2    | 2011/01/06 10:53:10 | AdventNetCC                                       [STARTED]
INFO   | jvm 2    | 2011/01/06 10:53:11 | SQLOne Search                                     [STARTED]
INFO   | jvm 2    | 2011/01/06 10:53:12 | AdventNetServiceDesk                              [STARTED]
INFO   | jvm 2    | 2011/01/06 10:53:13 |
INFO   | jvm 2    | 2011/01/06 10:53:13 | Server Started.
INFO   | jvm 2    | 2011/01/06 10:53:13 | Please connect your client at http://localhost:80

So as per article: http://forums.manageengine.com/#topic/49000003927100 I end the process tree for wrapper.exe.

2) Using updatemanager.bat I select the 7.6 upgrade file (ManageEngine_ServiceDesk_Plus_MSP_7_5_0_SP-2_0_0.ppm).

3) A full backup is successfully undertaken.

4) The terms and conditions are accepted.

5) The installation gets to the 'post invocation' step whereby an error is received.

6) I am forwarded to http://www.manageengine.com/products/service-desk-msp/upgardefailure.html with the Manage Engine error: 'Sorry, there is no web page matching your request.'.

I am not sure what log file I should be checking for information around this error (the event log button as part of the installation banner does not bring up anything).

What could be wrong?

thanks

Matthew