Hi Rio, you can use the v5 beta with any version 4 license including a v4 upgrade license.

You can put in your v4 upgrade license which starts with VER4UPG into the license key field at https://moi3d.com/beta.htm .

If you are having a problem with your v4 upgrade license not working there please send it to me at moi@moi3d.com .

- Michael