Do you get any errors or whatever?
So, it seems, if you change the properties of a behavior after creating a file that saved those properties, construct doesn't know what to do with the save data.
For example, If I create a new behavior and I leave in the this.myproperty that comes with the same behavior and then take it out later, the save file has a place for that property. When trying to load it it doesn't know how to interpret it.
I should think if it loaded an unknown property it should discard it at the request of the user. Idk... I havn't tried editing the xml file to correct yet, mostly becuase I am lazy and found it a good opportunity to restructure and rebuild those projects anyway