I have a certain number of coins on the old chain http://ganjacoinexplorer.com/ , But they are not in the new chain http://ganja.bilbotel.fr/ ,  I downloaded a new version of the v1.0.5 purse, but there are no my coins, I checked it in a new chain and it's empty, this purse does not exist, but in the old one there is something to do? Tell me please

why sell tagcoin at such a low price if it can be exchanged for tacach and it will be more profitable?

I have a few tagcoin coins, can I now exchange them for a tagcash? and how to do it?