From the tools page, under the installed repository the following options are available:
Specify here a space delimited list of filename extensions that should be viewable in the browser (ie., plain-text files)
The code browser typically will be refreshed automatically when there's a new change, but it can also be manually refreshed if necessary
Specific permissions for the repository can be configured here. Fine-grained permissions controls are not supported (e.g. restrict access by specific paths within a repository), if that sort of access control is required, consider creating multiple repositories with different permissions.
This will delete the repository on our servers, note that while this is normally very quick, there is occasionally a delay in removal.