Well the instructions are crystal clear so I don't see how I could have got it wrong but here ya go...
Currently the 2x file is renamed to Scaleinfos.bin.
Note: I have Star Trek Online installed in C:\Games\Cryptic Studios. I almost never install games into their default directory. It's obviously the correct directory as there was no nudity in the game until I copied the bin folder and the texture_library folder into that localdata folder. Before said copying, there was no bin or texture_library folder at all, in the localdata folder.
Here are pics showing no Scaleinfos.bin, 1.5x and 2x. As you can see, there is no change to breast size. Same thing when loading character into the game. The in-game tailor breast slider is not all the way over to min or max.
No Scaleinfos.bin:
1.5x:
2x: