In Opera you can just key in opera:webdatabases within the address area and remove all of the web SQL databases saved on your pc. How can you perform the same in Opera? I have to remove an indexedDB on my small localhost to test out a brand new version.
I determined how you can remove the databases. Home windows stores user data individually on the per application basis (on Home windows 7 in C:UsersAppData). And So I found the Opera Profiles folder within this directory, visited the indexedDB folder and erased the sqlite files. I Quickly restarted Opera also it labored! The entire path of Home windows 7 is much like: C:UsersAppDataRoamingMozillaFirefoxProfiles<*>.defaultindexedDB