I obtained both Miki4 and Tyler for free when they were released.  And when the SR's were announced, I updated the files without any problems through my account.  The last service release I own is SR2.  

Now, I did check the RDNA link WandW provided and I did not see any mention of SR3 unless I am missing something rather obvious.  Can someone verify that an SR3 really exists or is there a newer Miki4/Tyler release that incorporates all the fixes?