For users, there is no direct way to do so, the report definitions are stored in database. User has no direct way to change some global properties shared across all reports. As a hack you can create a script which replaces the occurrence in the database.
To find required reports, you can use following SQL query: select Definition from ReportDefinitions where Definition like '%SolarWinds Worldwide%'
This applies to Web based reports. For "Report writer based reports" the definitions are stored in "c:\Program Files (x86)\SolarWinds\Orion\Reports\" as xml files.
