How to change the condition set for a field to another field?

We've developed a form with a lot of conditional logic on the signature field only to find you can't clear it: http://form.jotform.us/form/60984429966171

Anyone know if theres a fix for this?  I was going to switch to the Smooth Signature field but then we would have to redo all of the conditional logic we created (theres a lot of it).  Is there a way to copy conditional logic to another field?

I understand that you want to switch to Smooth Signature widget by removing the existing Signature widget and you want to change the conditions with the new signature widget. Is that correct?

If so, firstly you may add the Smooth Signature widget to the form and change the conditions by selecting this field in the rules/actions of the conditions. Since the labels of the signature widgets are the same, you may change the label of the existing widget to identify the widgets easily in the conditions. Please see the screencast below:

Hope this information helps! Let us know if you are referring something different. We will be happy to help.