Databases created prior to version 1.90 only allowed one template per database. To convert to a multiple template database, move all the fields over by using the All>> button. If you wish, you can add or remove fields at time also. The program is aware that you are converting an old style database, and therefore the OK button will become available as soon as you move all the old fields over, even if you have not added or deleted any fields.
You may wish to check the Set all “Badge Changed” flags box so that all badges will be marked as changed. When conversion is complete you will be able to use the Change Database Templates command (see Reassigning A Badge Template) to add templates and reassign data to them.
You only need to convert an older-style single template database if you need the multiple template feature, or want to use the Changed field for selection purposes.
Read the warning above before converting your database, it is important!