At this time it is not possible to convert (import) an AI Classic project into AI2 other than doing so manually. A university student is working on a 'conversion' tool but its release date is uncertain, perhaps this Fall. When the converter is released, there is no guarantee it will convert the entire file. Many of us here at the forum are recommending users
switch to AI2
immediately. There are many benefits. So, to convert now, you have to review your AI beta code and use it as a guide to create new blocks manually for AI2. For some, this will be a lengthy process.
Most of us have already converted our projects. If you wait for a conversion tool, the tool may arrive too late to be useful and earliest estimates are currently early Fall, if at all.
Perhaps one of the MIT staff will post a current status? I am betting on no tool til sometime in the Fall. This is a difficult conversion and those working on it are trying to make it right.
Regards,
Steve