BTC not showing up in Armory, how do i rescan?

[let em have it.]

 So i've been mining for quite some time but still quite rubbish with computers.

 This morning i downloaded Armory to machine and sent 5 BTC, i got the scanning block chain for about 1hr and then a not responding msg, finally synced briefly but no sign of BTC in wallet and get a Armory not responding msg again.

  When i look in Blockchain.info i can see the 5 BTC transfer with 77 confirmations, but no sign of them in Armory. In other posts i see people mentioning doing a rescan, how do i do that with Windows 7?

  Thanks in advance for help and please bear with me, i'm sure i'll have a question regarding possible fix's.

  P.S. Used Armory last year on my laptop quite a bit and really liked it, bit disappointed its not working so great now and more importantly to have possibly lost 5 BTC.