Graal: A Major drain on CPU usage?

[Spunky2000ca]

Okay, the title explains it all.

When I play Graal, the CPU usage shoots to 100%
This does not happen on the login screen, but it happens in game, and in the level editor.
This recently started happening to me, and I know that it is Graal that is running up the usage, and not another program, because I have winXP.
For those who do not know, with WinXP, when you press Ctrl+Alt+Delete, it brings up another window, but it has more than the programs running. It has the CPU usage, PF usage, and a list of all programs, be they personal, or necessary system programs, listed in one of the windows. In that window, it tells the individual % of CPU usage. I watched Graal for some time. It stayed mainly around 75% to 93%

I am aware I do not have a perfect computer. I have 400mhz, but that is the most outdated piece of my computer's hardware. I think I am computer-literate enough to know that Graal shouldn't be running in the area of 350+ mhz.

I have restarted Graal, and used different versions. It doesn't seem to matter.

Are there any suggestions to how to fix this? It is cutting severly into the amount of time I can make my levels, seeing as it takes a long time to get a tile centered at the desired spot.