Symbian S60 "Expired Certificate" problem

HI guys, I am having a problem with my Symbian S60v3 phone. i can't use my favorite apps because of certificate expired error. Lots of people use Symbian phones even in this Android century like me. So if any of you guys have this Symbian certificate generator v1.0 skackteam or this kind of software please share or have any idea where i could find my S60 phone's Certificate and Keys.... please help.... Microsoft ate Nokia long ago and these phones are just like dead.. I will be very thank full for your kind help.....

Thank you....very much....