Attempting to upgrade from 1.8.1 to 1.8.2 on a Vista box and get an exception error followed by :
"Unable to write to C:\Users\<username>\Application Data\Quest Software\Quest Code Tester for Oracle\QuestCodeTesterOracle.ini"
Since the installation has completed, try running Code Tester as Administrator i.e.
<Right Click> on the Code Tester shortcut | select 'Run as Administrator'
Uninstall Code Tester and ensure that you rerun the installer at Administrator level.
Waiting for fix in a future release of Quest Code Tester for Oracle
When UAC is activated in Vista then the Code Tester needs to be run at an elevated level (i.e. Administrator).