I'm editing 2 different PDF forms, last years an internal PDF form created from external source pdf and this years external source PDF with changes converted to a PDF form.

1. I can't open the 2 forms in separate instances of PDF form editor, or at least it is not ready apparent on how to do this.
2. Being that I'm unable to open the forms in 2 separate instances, I open both PDFs in same instance and pull one of the tabs to another monitor. 2a. Each time I click on the properties menu item, the dialog box is shared by both forms, instead of each form having its own dialog. I am changing the field names on the new form to match the names of the fields on last year's form. Once done, last's year form will be deleted. 2b. Each time I paste the new field name in the properties dialog box, I want to add a tooltip and change other attributes of the field. However, when I attempt to move to the tooltip box, the cursor jumps to the next field in the list instead staying on the current field being edited.

Why can't each form have it own properties dialog or
why can't I open the 2 files in separate instances to eliminate the sharing of the properties dialog?