Im not to sure how you installed this pkg but if you used the pkgtool in slack , you can use it to uninstall the pkg. Otherwise , i think you are in for quite an indepth search (ie have to find what files were installed and remove them!) although , if you installed it as a local user then it probabaly never went anywhere that it wasnt allowed to go.
I myself am new to installing files and also have the question of "Now where in this directory can i copy these files to?" , i guess this happens to all of us that try keep a little discipline over what goes where. all I can suggest is for you to add a /bin directory to your home directory and then add that directory to your PATH env variable or else add a world readable directory under /user/share and do the above, thus giving everyone access.