Trouble with translating Q&A plugin

I have tried translating the Q&A plugin, but I must be doing something wrong.

I have downloaded the qa.po from wp-content/plugins/qa/languages

I have opened it with Poeditor in Ubuntu

I translated the terms, and saved the file as qa-el.po (because in my wp-config my WPLANG is el) and uploaded it in the languages folder.

And yet the translated text is nowhere to be found.

Am I doing something wrong? Do I need to do something more?

I also tried translating within wordpress, with the plugin

However, when I try to add a language for QA, I get these this message:

"Loading Issue: Author is using load_textdomain instead of load_plugin_textdomain function. This may break behavior of WordPress, because some filters and actions won't be executed anymore. Please contact the Author about that."