GUIDs (Global Universal Identifiers) are unique identification strings that help Cherwell Asset Management distinguish one version of an application from another in situations where there may be no difference between editions in the size of the main executable file.
The GUID string is used to determine the version of the application, and can also distinguish whether the application was sold separately or as part of a suite with other products. (For example, a GUID associated with Microsoft Office 2013 distinguishes it from Microsoft Word as a standalone application.) The Cherwell Software Identification Database (CSID) includes GUID information for suites such as Microsoft Office and other non-suite applications where needed.
Unless you're absolutely certain of the GUID assigned to the application or suite in question, leave any GUID text boxes in Cherwell Asset Management dialog boxes blank. Entering an invalid string in a GUID text box will cause that application to be misidentified.