eXtplorer - PHP-based File Manager

Hello,
An admin had recently installed the updated eXtplorer on our Joomla site (I believe it is 3.8.3).
It worked fine for him while he was using it but he was still logged in.

When I try log in, I get this: (domain replaces our URL for security reasons)

[{'name':'administrator','is_file':false,'is_archive':false,'is_writable':true,'is_chmodable':true,'is_readable':true,'is_deletable':true,'is_editable':false,'icon':'\/\/domain.com\/administrator\/components\/com_extplorer\/images\/extension\/folder.png','size':'4 KB','type':'Directory','modified':'2018\/02\/08 02:15','perms':'755 (rwxr-xr-x)','owner':'domain (7014)'},{'name':'bin','is_file':false,'is_archive':false,'is_writable':true,'is_chmodable':true,'is_readable':true,'is_deletable':true,'is_editable':false,'icon':'\/\/domain.com\/administrator\/components\/com_extplorer\/images\/extension\/folder.png','size':'4 KB','type':'Directory','modified':'2016\/08\/23 18:44','perms':'755 (rwxr-xr-x)','owner':'domain (7014)'}, and 49 more of these

screengrab: https://i.stack.imgur.com/SKZG8.png

I went to remove the plugin manually from the site. Using the example from https://www.ostraining.com/blog/joomla/disable-a-joomla-plugin/ , I tried looking through the database for com_extplorer and extplorer and eXtplorer and I only found 2 instances of the name in the Joomla redirects table from an older installation.

Using FTP and removing /administrator/com_extplorer and /components/com_extplorer directories did not fix the error either.

The website loads fine on the front end.

Is there a fix for this that I am missing? There have been changes since the last backup that we are trying to avoid loosing.

Thank you
John