Same here. Updated last month and since then, very very slow.
About 10 sec to open any windows - Pay bills / Enter Purchases / ... - and even to close them. I have about 2 or 3 times a day the software "Not repsonding"
Previous quarters, GST summary was about 20 sec. Now I have time to make a coffee...
It's the only software that is running slow on the computer. I can use Macro linked to a 250Mb Excel files as fast as before.
Went throught "http://help.myob.com/wiki/display/ar/Speed+and+performance+tips" without any difference.
Computer spec are Intel i3 / 8Gb Ram / W7 Pro / 500Gb HD so plenty enough for MYOB. MYOB filr is about 44Mb, so quite small and ntohing in the cloud.
I just loose hours/week to wait for the software to do something.