Try version 5.0, it should be better on memory management.
Besides the first haste, the 5 seems to work much better in every aspect, I will be more vise after long up-time, but till then It looks great. Thanks.
The updater for 5.0 is not on yet, it will be distributing the updates over the next week. You can get it from www.download.com today!
I checked it before posting and it was 4 version and I checked it now and it's 5. But I think you made this wrong, you proclaimed the 5 version is out and then you started to supply it. You should first be sure to have it available and then claim it's available.
Try version 5.0, it should be better on memory management.
But how? I can't download it directly and it won't update me to 5.0. Every start it keeps asking me for activation and after clicking 'finish' it freezes. When I did manual activation it get trough once (usually freezes there too), but after restart it asked to activate again. And when I update the definition will update, but the program won't get to 5.0.