Actually you might want to download from here:
http://pbchess.vlasovsoft.net/en/index.html
If you have a "status bar" in your beowser view, when you mouse over the download link you will see the real version number.
You shouldn't need to install fmon, as it is included in the pbchess install.
Sergey's port of CoolReader is not as mature as Koreader, and still has some issues but it is coming along and will probably catch up with Giorgio's Koreader port. There is no problem with having both, making it four altogether. Two from Kobo, the Koreader and CoolReader.
Luck;
Ken