You can change to normal 96 DPI as follows :
1. Click Start | Control Panel | Appearance And Themes | Change the Screen Resolution. This brings up the Windows “Display Properties Box”
2. Click on the “Settings” Page then click the [Advanced] button . On the “General” page, ensure the the DPI settins are set to “Normal Size (96 DPI)”. Apply the changes. You may have to reboot windows.
3. Start Ezy Invoice again, go to the Options button and amend the “Lock Date” to a date prior to the invoices you want to edit.