If the SST console software quits responding during a meet it usually means that the computer has lost communications with the SST timer.  The most likely cause of this is that the USB port is set to a power saving mode, which means that the port is turned off by the computer to save power.  This setting is typically in the power saving options of your computer.  Make sure power saving (or in some cases called “selective suspend setting”) is turned off or disabled.  The other, less likely, option is that the USB connector that plugs into the computer is dirty.  In which case clean it with a contact cleaner.