Cannot Find the Default Config File for Rofi in Fedora Sericea

Where is the default rofi configuration file in Sericia?
It is not in $XDG_CONFIG_HOME
I want to add an application that I installed as a tar.gz tarball file.
I added it to my /opt/ and added that to my $PATH.
The executable is in the extracted folder.

I added it to my $PATH in by ~/.bashrc, so I can run it from Bash. I tried adding it to my /etc/environment, but after rebooting, rofi still couldn’t run the application so i removed it. My /etc/environment did not exist so created it. When I tried to run the applicaiton and it didn’t work I deleted the /etc/environment file undoing what I had done.

The method used for installation is indicating that this is a self-compiled app.
Does not the documentation from the source give you any information? It should.

You did not even provide a link to the source you used so we are crippled in how to even test what you claim to have done and cannot review the documentation to make suggestions.

http://www.catb.org/~esr/faqs/smart-questions.html#beprecise

If you meant you are running Fedora Sericia then that is an immutable system and management is different than is done with a normal workstation type version. Installing 3rd party apps can be very difficult on such a system.

A quick search for ‘rofi linux’ gave me a lot of links but without knowing the exact source used it is difficult to do a test of any reasonable kind.

Rofi is installed by default.

No the application has no doccumentation. It is a web game, Tetrio. I am not compiling it; the executable is in the tarball.

This is it: DESKTOP - TETR.IO.

It is not open source (unfortunately). The tarball is the only viable install option.

Okay this is embarassing. So the problem is that I had to run it with the toolbox run command. Works in Rofi now.

This then is a typical example of an X Y problem.
Your title asks about a config file for Rofi, but the solution shows that you are trying to run Tetr.io