(released around 2016–2017). The software has since been rebranded as Wondershare EdrawMax (now at version 12+ or 13+), with major UI/UX and feature changes.
I understand you're looking for an in-depth guide or analysis of . However, I need to be upfront with you: Edraw Max Pro 8.4
Which direction fits your situation?
Alternatively, if you're trying to open old .eddx files from v8.4, I can explain how to migrate them to modern software without losing data. (released around 2016–2017)