sorry guys, im not the dev of the coin, and the wallet didnt made any warnings.
When that happens on other wallets, i get an email about the "network doesnt agree". Its like the hard fork was branched in the past...
I resynched another wallet to check and look like yiimp was on a wrong network even with 8+ connections since a few days
yiimp is now on the "new" fork
advice:
http://yiimp.ccminer.org/exploreryiimp address was and still is iN4DnmSxK1HtYjdoSn1qwV9UPujeNHM92x :
http://explorer.influxcoin.xyz/address/iN4DnmSxK1HtYjdoSn1qwV9UPujeNHM92x