I have an old Kobo Touch where the new version of ADE doesn't work on my MAC. I've read on multiple forums that I need to install ADE Version 3.0 in order to me to download books to be transferred to Kobo Touch. However, after downloading 3.0 on my MAC, the installer says, 'The developer of this app needs to update it to work with this version of macOS. Contact the developer for more information.' Does anyone have tips on how I can get 3.0 on my MAC so I can read OverDrive books on my Kobo Touch??