DeepakP It is not that difficult so there is no document like that yet. There are two thing to consider:
1) Transfer all your data. Tonfotos automatically saves all the faces data into ini files, so when you move your archive make sure you move those files too. Also, there is separate set of informatin about people that is stored in dossier file, make sure you save this BEFORE deleting Tonfotos, more about it here: https://tonfotos.com/docs/library/setup/#data-files
2) Transfer the license. This is very simple. When you uninstall the application, the activation gets freed, so you will be able to activate later on the new installation.
In any case if you have issues, we are here to help.