Since my first encounter with Invigorator 4.something, it has been crash prone. More recent project suffered multiple crashes till I can no longer apply the effect without an immediate crash.
My 5.0.9 Invigorator is running in AE5 ver.10 on this machine:
Model Name: MacBook Pro
Model Identifier: MacBookPro5,2
Processor Name: Intel Core 2 Duo
Processor Speed: 3.06 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MBP52.008E.B05
SMC Version (system): 1.42f4
Also, I wonder if some of your presets may have gotten corrupted. To fix this, go into the Documents > Zaxwerks folder and delete the 3D Invigorator PRO folder. This will reset all the presets and you should be able to apply the plug-in without any problems.
If you're still having any problems, please let me know.