Welcome to the forum.
Many users felt that PrE 8 was a very weak release (kind of like Adobe's version of MS's Vista OS), but most users, with properly setup and tuned computers, find that PrE 10 is a very stable build.
For the issues with PrE 8 crashing, I would see this ARTICLE. It starts with a checklist on setting up PrE and the computer, for best results. Then, it goes into many tuneup tips, for both the computer, and the OS. Finally, it lists links to help with troubleshooting.
Good luck, and hope that something in the article helps,
What are the pixel dimensions of that ballon jpeg?
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As compared to PRE 8, PRE 10 is much more stable version. And if you have 64bit hardware, PRE 10 has also the capability to utilize it.
If you are thinking to upgrade, PRE 10 is probably a good version to move on to.