You will need to find and edit the SystemManager.config file - it will be located within your user account's home directory in the ..\NetApp\SystemManager path.
Once you have located the file, carefully edit the path located within the <browser> tags to reflect the path to the browser you wish to use. I recommend using an XML aware editor such as Notepad++.
Example: <browser>C:\Program Files (x86)\Mozilla Firefox\firefox.exe</browser>
Thanks,
Kevin