I tried to convert a 3DMax exported file into Y_UP using the conditioner in Collada Refinery, Refinery immediately crashes. The only time it doesnt crash is when Z_UP is specified which is what Max exports to in the first place, meaning it doesnt have to do anything.
After further experimentation, it appears to only happen when i have a mesh skinned with animated bones. A skinned mesh with non-animated bones doesnt cause it to crash, i suspect it is crashing when attempting to export the animation keys.
I made some changes on axisconter related to Animation.
You can get the update by just click Program Files->COLLADA->COLLADA Refinery->Update.
Note that the changes are on Updater and SourceForge svn only.
The Download packager installer is not updated.
For the optimizer, I may need more help from you.
If you could get me the DAE files that trigger the crash that will by very helpful.