Technical Migration ...
The migration to Minyaa 4.x is mainly described in the Upgrade Notes.
If you encounter issue in this upgrade procedure, then raise a Support Request to our JIRA
Licence Migration ...
In terms of licensing, Minyaa 4.x has joined the current Prices Structures of JIRA, with the same User Limits.
If you are licensed for Minyaa 3.x, your license will be converted depending 2 axis :