I did the same thing with mine. Lost all maxisys files contact the actual support department through email. They may be able to walk you through getting your cars back.
Please provide us your serial No., if your device is still within the updating period, you can go to Maxisys->Update to download all the software again.
If you missed Maxisys app, please contact support@autel.com.
The unit has been expired on 2015-06-13. You can go to our website http://pro.auteltech.com/ to register your account and then we can transfer to your own account.