Hey Rexx,
Thanks for your message. Yes we updated the course to the latest version of Unity. As @MichaelP said we do this periodically to make sure the students have the most up to date teaching practices and new features in the software.
We understand it’s frustrating to lose your progress, and do our best to provide plenty of notice in advance when we’re planning an update. On GameDev.tv we sent an email a month in advance to let students know this was about to happen, and on Udemy we sent several Educational Announcements to keep students updated. However if you’ve opted out of receiving announcements / emails on either platform then these won’t make it through to you.
If you have the course on GameDev.tv then you’ll automagically have access to both the original course content and the new course content. If you have the course on Udemy please check Section 7: Updates and Important Messages for details of how to access the original content.
Hope this helps?
Lucy