1X and 2X help me with these plz

i have downloaded arm gears that are 2x and when i put it in my game it doesn't appear well
how can i make it appear or probably make the 1x gear to a 2x gear becaue 1x arm gears work well in my game
plz teach me

To convert 2x to 1x :

1. Open the file with FshX
2. Click on "texture" and select "Half Resolution"
3. Click on "File" and select "Save"

To convert 1x to 2x :

1. Open the file with FshX
2. Click on "texture" and select "Double Resolution"
3. Click on "File" and select "Save"

how can i open it with fshx bro?
teach me plz

Open the FshX at first, then press File / Open and choose a location. That's it.

where can i get that fshx thingy i dont see that here in my computer
plz help me