Here are some instructions on how to Extract the Mailers+4 download and run the install:
Download then Extract Mailers+4 zip file (mp4_202012.zip) by right-clicking the mp4_202012.zip folder and selecting "Extract All"
Select the Destination of the extracted Mailers+4 file (for example, Desktop) and click "Extract"
Open the newly extracted mp4_202012 folder and double-click "setup" to run the MAILERS+4 Setup Wizard.
NOTE: There may be a prompt to allow this app (Mailers+4) to make changes to your device. Click Yes.
Once the Mailers+4 Setup Wizard is open, click "Next" and proceed through the following steps to install Mailers+4 to your desktop.
NOTE: Please make sure that Mailers+4 is closed before running the Mailers+4 Setup Wizard.
Please Read the License Agreement and select "I accept the agreement", then click "Next" to move forward with the Installation.
Select Install Location
Select the Install Location for Mailers+4 and click "Next".
Select where the Start Menu folder will go and click "Next"
Select Additional Tasks that should be performed (such as Creating a desktop Icon to make accessing Mailers+4 easier) and click "Next"
Confirm Installation settings and click "Install".
Once the install is complete, click "Finish".
Mailers+4 should now be available to open!