On a 13 year old rig the thread has probably rotted and needs re-sewn. Even if the fabric has ripped, there is enough unused to take it off and cut off the ripped section and sew the rib back in.
This post is my opinion, worth what you paid for it.
Our ”New” ride...08 HR Navigator 45’. A nice upgrade after 14 years with a 04 Dynasty 42’.