Just to be completely clear 
tell your file manager to show hidden files. Go to /home/yourname/.config/tint2, in your home folder.
Ther you’ll see the file tint2rc. Right-click and open in your text editor. There is your panel configuration. What is in your configuartion is likely messed up, as you want to reset it. Therefore you’ll have to replace all the text you see, with the original text.
This original text you can find on the EOS Openbox github. Go into their .config folder and look for the tint2rc file, and click on it.
This procedure is useful to know, because it is how you configure a lot of stuff in Linux. Good luck!