On the website version of the C-Store, the Ships tab does not function with the Hide All: Already Unlocked option. This is regardless of using the All tab, Federation Class or just Klingon Class tabs being displayed.
This has been the case for a long time. And it would be helpful for sorting if it could be fixed.
STO Forum:
Where the Human Adventure is Just Beginning!
<=============================
Exploring STO Since Pavement. Tier 2 Constitution for Fleet Refit!