in case of hard fork of bitcoin and split of the blockchain how the dPow algorithm will work?
We will use the chain with biggest hash-rate to get the best security.
Where Iguana wallet is stored under Windows?
%AppData%/Iguana
Is the new wallet would indicate the number of REV shares you have if you have bought BitcoinDark and have it exchange via ICO page of Komodo?
The new wallet has REVS in it, you can launch it in Basilisk Mode.
You should see your REVS balance if you have requested a payout/withdrawal from the ICO site. The REVS are sent together with KMD, and they both can be accessed with the same seed, so you can just add KMD & REVS in Basilisk Mode and you should see them.
You can also use the block explorer: revs.supernet.org (type in your KMD address, it uses the same address)