Not sure if you've resolved or not but one quick way to "reset" website is:
perform diag for system [and main NPM if not same box] to open case if desired
shut down all services
rename (.old) or delete \inetpub\solarwinds [(\inetpub\solarwinds.old) or something]
run config wizard and select website
it will now rebuild the web site.
**** Keep in mind you are resetting website...you'll have to re-add any customizations (icons, web pages, etc..)
