Attention: Before Upgrading to MR4 from any version of MR3, ensure you have a backup of your data, and that there is plenty of space on your PC or on your preferred External Database location to import your database. Refer to the separate document, MR3 Backup and Management, for instructions on creating a backup of your database.
Attention: Data is not compatible between MR3 and MR4, including External Databases. Data stored in MR4 cannot be imported back into MR3.