wavelady

Any clue why I frequently get the spinning beach ball while using WavePad on my iMac? I'm not doing anything unusual, very simple edits of a voice track. I have the free version (3.20) and was considering purchasing the Master Edition, but now I'm wondering if this is a solvable problem...

Would love to be able to use Wavepad with keystrokes. Found a list for them when I used Wavepad on a PC but haven't located any for Mac. Any suggestions?