Yes, you need to access ArcStudio, and open the .apl file and double click on the edit form, that should pull up the form in a new window. Double click the fields within your form in which you want to alter the properties of. You should see some field properties, look for "Required" if it's checked, un-check it. Do the remaining fields, hit ok, open them in ArcPad and see if the properties held. Hope this helps.