Enrollment Visit (Day 1) At the End-of-Study/Final Visit, Day 84 of Study No. WL-1001-05-01 (or preferably < 30 days following this visit) subjects will be invited to enroll in this long-term open label Study WL-1001-05-04. Subjects will sign a written informed consent prior to being enrolled into the long-term open label study. If enrolled at the final visit or < 30 days after the final visit of Study No. WL-1001-05-01, the final visit physical examination and laboratory examination will serve as baseline for this study. If enrolled > 30 days after the final visit, a new physical examination and laboratory examination will be completed upon enrollment into this study. The subjects will complete an OA Pain Score and Subject Global Evaluation (SGE) for their Target Knee, the same knee designated as the Target Knee in Study No. WL-1001-05-01. A 13-week supply of study drug and subject diaries for the next 13 weeks will be dispensed to each subject. Instructions on how to apply the study drug will be reviewed with the subjects. Subjects will also be instructed to complete their diaries daily (Adverse Events Log and Other Medications Log) and to return their completed diaries and study drug tubes at each clinic visit.