I've looked into this coin for some colleagues of mine and found some issues.
First, upnp is disabled in the code itself, meaning clients can't connect to each other, only nodes - of which there currently only seems to be one that is active. I fixed that code and recompiled the wallet, but either that one node isn't relaying peers or nobody else is running the coin with a connection to that node.
Second, the old wallet issue is a simple one. The reason you get an error when you try opening an old wallet.dat is because of the 0.2 versioning. The old wallets were 1.0+ wallets, so when you try to open an old wallet, it thinks you're trying to open the wallet with an old client. Fixed that.
Third - Yesterday I had a colleague send a large amount of coins to the exchange with the custom wallet I had to make for him because the one made by the dev cannot open old wallets (see above) and they were never confirmed despite showing up on the then functional block explorer. However, I was able to send a small amount of coins (1000) to the exchange from the same wallet afterwards, and they *were* confirmed by the exchange.
Fourth - The node that is online is not relaying blocks from the chain, making it impossible to sync. I expect that this is the same issue the explorer is having.
I've found all the issues I have encountered to be obvious from a coding perspective and the fixes trivial at best. I don't know anything about the state of the chain, or why the nodes have stopped relaying blocks. So take all this for what you will.