Is it OK to post a screenshot taken from home page of the software or from another page dedicated to the software?
Example: I see relevant screenshot at
What level of grabbing is acceptable?
A. Hot-linking: post a link directly referring to the screenshot (www.example.com/screenshot1.jpg) Concern: this is drawing bandwidth from the site (in many cases metered and paid by volume)
B. Copying: make verbatim copy of www.example.com/screenshot1.jpg and upload the file to answer. Concern: copyrights - re-posting of site content should be done with explicit consent of site owner
C. Derived work: use only relevant image area of www.example.com/screenshot1.jpg and upload the file to answer as image (the image won't be the same as the original). (i.e. always create a derivative work. Do not post a screenshot which is original elsewhere.)
D. Own work: get and use the software, then create own original screenshot