SMPS Transformer - Secondary voltage rating
Windings 1-3 and 2-4 are the same. The rest are "12V" windings.

If you connect the 1-3 and 2-4 in series the turns ratio will change from 2.5:1 to 5:1 and the output voltage will go down by half.

You should be able to put the secondary winding in parallel or in series depending on what you want.