You have disabled uploads of certain file types in Joomla!'s Media Manager. Please remember that ATS does not handle uploads by itself. It uses Joomla!'s API. The exact configuration of what can be uploaded by whom is defined in the Options of Joomla!'s Media Manager. This has always been the case. In fact, we haven't touched the uploads code between the first draft versions we used on our site (before 1.0.0 was released) and 1.3.2. Hint: you may want to disable the MIME type check in the Joomla! Media Manager's Options page.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!