Hi Brad,
Thank you for pointing this out.
The default target folder for AMIs should have been /var/www/ems since that folder has the correct permissions for the EMS daemon. We will modify the web UI interface to have that as the default value for the target folder option.
As for deleting streams through the web UI, it does not currently support removing HLS/HDS streams. This will be added later on as the web UI matures.
For now, you can remove HLS and HDS streams through the telnet/json interface and issuing removeConfig command by giving the related config ID or groupName of the stream you want to remove.
Cheers,
IC