This is the default program installation directory. Depending on what PRL Reporting Software Option (and version) you are using it may contain the Option A, Option B, or Option C programs, blank “templates” for Option B Excel workbooks, and supporting libraries (DLLs); older versions of the Client software installed each Option into its own subfolder. There is no reason for you to access any of the files in these folders. The report files you save are not kept here.