Saltcorn 0.4.5 has been released. This is mainly a bugfix release, fixing numerous bugs, crashes and unhelpful error messages. In addition the following changes were applied:

• Radio groups: string options and foreign keys can now be chosen with a radio group rather than a select drop-down, using the radio_group field view
• In the builder images can now be specified by a choice of uploaded files, URLs and fields (which can be either files or a string containing that the URL)
• This system tab in the administrative interface will now show of the database version and the process uptime
• There is a new security test suite that tests authorisation and authentication with a python script. This uncovered a number of denial of service and minor bugs, but no escalation of privilege vulnerabilities 

The next release will focus on performance improvements and should bring a substantially improved user experience.