Hi,

the setting still work, you can try select the other file extension and upload it, the conttrol will throw the error with file extension does not support. this due to the system/browser limitation, so we can not do the full control of the select file dialog, but the uploader will still valid the file extension at server side, do not need to worry about the user can uploads other file extensions except the one you set for the uploader.

regards,

Ken