Undo signature to undo form no longer fillable

Hi,

I filled out (partially) a fillable pdf form. I signed the signature part of the document and this rendered the document unfillable from that point on which was not my intent. There was no warning that this would happen. I spent alot of time filling out this document and I desperately don't want to have to fill out a brand new one.  Can I "undo" my signature so I can get the fillable fields back or is there something else I can do to get those form fillable fields back?  The fillable parts of the document had a highlighted blue section. Now the document is just black and white and I can't add any text anywhere. Please help!! this has never happened to me in a pdf field before.

I have attached the form. Now, i see that after filling in the signature the form goes all to black and white. How to undo this?