To edit this information you will want to do the following. 
For a program does not require registration
  1. Go to web forms.
  2. Go to manage program forms 
  3. Search for the program
  4. Then find the event you want to edit and click the expand button next to it. 
  5. Click the Options button
  6. Scroll to the area below and make edits
  7. User-added image
  8. Click save.
  9. This will need to be done individually for each event. 

For programs the require registration.
  1. Go to web forms.
  2. Go to manage event registration forms. 
  3. Search for your program and hit the expand button next to it.
  4. Hit the options tab.
  5. Go to the Language tab.
  6. Use the drop down for category to select Memberships- not eligible for purchase information.  
User-added image