How can I edit the My Account menu?

[lostmytophat]

I'd like to remove these two items from the my account menu - can someone direct me how to do that please? Also I would prefer to remove "Not (user name)?" from before "Logoff" in that drop down menu. Help will be apricated 

[Basara]

Enable debug in System Settings to find controller and .tpl file (where html rendered) to edit https://abantecart.atlassian.net/wiki/spaces/AD/pages/7569496/Debug#Debug-Templatedebug

[lostmytophat]

Okay, so I used your tip (very useful tool, thank you for letting me know about it btw), and I found the files. I tried editing them by removing the lines of code I highlighted in the attached image. It gave no result, the menu was unchanged. I made sure the cache was off and cleared my browser cache, even tried it on a VPN so I don't think it's a cache issue, I think I probably must be missing something. I freely admit, I'm no expert at this though, not even close, so I rank the chances of me missing something fairly high. Any help would be very welcome 

[Sam_78]

are you sure you changed the correct file ? If you have an extension then there will be same files with same location path
example extensions -> theme-> storefront .....
As you said you tried removing them and things were unchanged I think you are in wrong file.