It is Step 14 of the Update installation instructions:

You also need to update your RTM for check printing (DBA Classic and Evo-ERP) and Aging report (Evo-ERP only).  The updated RTM is available in the RTX subfolder.  Copy the appropriate file to the main folder and rename the extension from RTX to RTM.  If you have modified the check RTM for alignment on your checks or other changes, you need to make the same changes to the new RTM, or you can open the new RTM in the RTM editor and copy the field for Invoice Number and paste it into your old RTM.