How to use the GetSimple Blog plugin?

[datiswous]

That makes no sense ... he updated the plugin on March 26, 2016 ... Do I really have to use WordPress now? I don't want to use WP, I like GetSimple ...

Yeah I don't think he doesn't give support at all, just that his focus is more on the new version. But if you ask in the support topic he might help you and otherwise maybe someone else will.

Otherwise there's also Newsmanager or I18N search + I18N Special pages (which can be used to make a blog). See here:
http://get-simple.info/wiki/plugins:guide#blog_news