The Optimus Hiker+ stove was discontinued in 2020. Here’s the Optimus Hiker+ manual for you collectors or for anyone who needs one. Free of charge. The jpgs are below. Click on each image for the full size jpg.
Or, slide down the page farther for a link to get the PDF of better quality.

Better quality PDF copy of the manual (about 486KB):
Optimus Hiker+ Manual