If you keep original seed phrase you'd book your address with, go to Settings > Recovery > Wallet address recovery. This recovers wallet address only, without the balance. From the last release, it keeps existing wallet seed (not rotating to the provide one, just getting the address back).

There were few reports regarding app freezing. There is an issue #128 on github related to that. If you do have any circumstances when it started please reply here / comment the issue (you might try to turn off / switch to another network connection to see if it's not network related). For some users, reinstall fixed the issue.