We still have some clients who have not updated. Can we run 6.4. and 6.5.0 until all of our clients have updated?

For best practice and to keep your data safe, once you have updated we recommend you only work in Agrimaster 6.5.0.
We have been working with some of our Professional Partners to assist their clients with updating. We can assist you with a tailored communication plan to help your clients updated to Agrimaster 6.5.0.