You can delete the layouts that you do not use. We recommend that you take a picture (or screen print) of the layout setting(s) that you consider redundant. That will make it easier to recreate them if they would be needed again.

There is a special upgrade of handrecords on the Duplimapp web site, but note that it will erase all layouts that you have created yourself. So, you should make screenprints of your custom layouts before upgrading the standard handrecord layouts.