Thanks Anmer for replying -- I was beginning to think that I had asked a question that didn't deserve a reply.
I was away all weekend so apologies for the delay.
The Basestation sqb file gets updated in realtime so you won't "lose" any data if the PC or program crashes.
I run Basestation 24x7 and don't have any performance issues, unless I'm running other resource hungry applications. If your laptop is dedicated to Basestation and associated software, I would have expected it to run OK and not "slow" up?