"As I said previously if you try to make a Hybrid style and update the styles in there it comes up with the Old Style Picker..."

I went to File - StyleMaker - Make Hybrid style - .STY
that bought up the old Stylepicker, but on a re-build it don't find the new styles.
Old Stylepicker 4,484
New Stylepicker 4,901

They might update the Make Hybrid style to bring up the new stylepicker window.
But if you still want to use the old picker you can make up a hotkey with AutoHotKey to bring it up - copy the style name - open the new stylepicker - paste it in.