Lectora keeps crashing on me

I have been using Lectora 2007 for a 18 months now without a problem. However, it has now started hanging on me every time, especially when I try to use the screen capture tool.My PC has not been changed. There are no new applications on there, no viruses, etc. I have 1Mb of RAM, Pentium 4 processor, etc., so all should be fine.Does anyone have any suggestions? I've tried un-installing and re-installing but the problem persists. I have the original product licence key, so I know that's correct.

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