Subversion ALM 7 does no longer stores the Subversion data into an external H2 database instance. It has been replaced by the JIRA's database (Oracle, MS SQL Server, MySQL, PostgreSQL).
The subversion repositories have to be registered again. Fortunately, Subversion ALM 7 provides an importer from 6.x versions. Anyway, the repositories must be scanned again once they have been imported.
The Subversion ALM Database console has been dropped. You have to use your regular database client instead. Of course, as the Subversion data is stored on the same database than JIRA it is possible to write powerful native-SQL reports for JIRA and Subversion.
Subversion ALM 7 is commercial: a valid trial or commercial license is required to scan the Subversion repositories.
Please follow this link to read how to show the import links: