Nevertheless, the instruction is not quite correct . Maybe is OK for your phone. But the theme author did not specify which device it has.
Does not need to be uninstalled. It can only be re-installed again over the same apk. Has nothing to do with license folder, only with save. Tested on NOTE 10 (personally) and S10.
On my Sony works as posted. No conflicts at all.


Edit, so far:
Some devices require the Folder to be completely removed (move it to mSD if you have it - if not move out of phone, then move back).
On some devices it was enough to run the program several times.
For some models the problem was made by TTS (where it was used).
With some systems factory reset had to be done..