Ah, IMatch Anywhere. Didn't notice that. Too much stuff going on right now here in the community...
The WebViewer config file is in "C:\ProgramData\photools.com\IMatchAnywhere\config\immbcfg.xml"
The IMWS storage database is in "C:\ProgramData\photools.com\IMatchAnywhere\IMWS\storage.db". This stores all the data apps have stored using the /data endpoints. This includes IMatch Anywhere WebViewer.
See the IMA documentation for Administrators for more information.