Kelvin051 wrote on Jun 29^th, 2021 at 6:00am:

Hi I just bought 777-200 Base pack and 777-300 but my version is P3D V5 so that I can't install it how can I solve it ?

CS has stated that they are not interested in updating this version of the 777 to V5 anytime soon, if ever. (My money is on never)
Your only 2 options is to either revert back to V4, or ask for a refund (if you never installed/activated it)