2017 R2: option to retain form dropdown selections

I am trying to help the programmer from one of our sister plants. Currently, there is a form (CS2) that they fill out at the beginning of each run (see image above). I used dropdown lists for the critical fields to prevent typos that would break transferring the measurements to a database. The problem using a dropdown list has created is that while the non-critical fields can be retained for the next run (by answering "Yes" to C1), I could not find a way to retain the dropdown list selections.

I have previously tried using ASSIGN to set them, but the form still defaulted to a blank selection. Does anyone know if it possible to retain all selections and inputs for a follow-up run?

GRP_START  =GROUP/SHOWALLPARAMS=YES
C1           =COMMENT/YESNO,NO,FULL SCREEN=YES,AUTO-CONTINUE=NO,
              Is this the same order as the previous part?
              IF_GOTO/C1.INPUT=="YES",GOTO = CS2
              ASSIGN/CUSTOMER=""
              ASSIGN/SIZE="LG"
              ASSIGN/THICKNESS=3
              ASSIGN/CUT=""
              ASSIGN/MATERIAL=""
              ASSIGN/JOBNUMBER=""
              ASSIGN/SERIALNUMBER=""
              ASSIGN/FIRINGNUMBER=""
CS2          =FORM/FILENAME= C:\USERS\PUBLIC\DOCUMENTS\HEXAGON\PC-DMIS\2017 R2\DO NOT DELETE\LEXINGTONTORSOFORM.FORM
              PARAM/CUSTOMERLIST.TEXTVALUE=CUSTOMER
              PARAM/THICKNESSBOX.TEXT=THICKNESS
              PARAM/MATERIALLIST.TEXTVALUE=MATERIAL
              PARAM/CUTLIST.TEXTVALUE=CUT
              PARAM/SERIALBOX.TEXT=SERIALNUMBER
              PARAM/FIRINGBOX.TEXT=FIRINGNUMBER
              PARAM/JOBBOX.TEXT=JOBNUMBER
              PARAM/=
              ENDFORM/
              ASSIGN/PN=CUSTOMER+CUT+SIZE+THICKNESS+MATERIAL
              COMMENT/REPT,
              "Part Number: "+PN
              COMMENT/REPT,
              "Serial Number: "+SERIALNUMBER
              COMMENT/REPT,
              "Firing Number: "+FIRINGNUMBER
            ENDGROUP/ID=GRP_START