How to Uninstall Freefilesync from Ubuntu

I installed FreeFileSync for my Ubuntu 20.04 from here;

Installation was successful and the app is working. The problem is I can't remove FreeFileSync from my device.

1. I tried ubuntu software centre: It is not listed there
2. Tried following commands. But none did work

sudo apt remove freefilesync

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package freefilesync

sudo apt-get autoremove freefilesync
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package freefilesync

Any help?

Update: Here is the output for which freefilesync

aca@aca-00:~$ which FreeFileSync
aca@aca-00:~$ which freefilesync
aca@aca-00:~$ which RealtimeFileSync
aca@aca-00:~$ 

No output actually :(

Update 2; My ubuntu Version

Output of lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.2 LTS
Release:    20.04
Codename:   focal

Update 3: Problem Solved

There is an uninstall.sh file at /opt/FreeFileSync/. (Lol, I spent hours for this)