A bad and good experience with ArgoUML

Yesterday,I could not open my sharefile.zargo file.the thing is below:

It showed error message below:

  Could not load the project file:/c:/.../sharefile.zargo Project file

probably

corrupted. 

  The console said:

  [Fatal Error] :19:-1: illegal XML character:    ￿.

  org.xml.sax.SAXParseException: illegal XML character:    ￿.

I hardly to decide to give up the idea of using ArgoUML.

I posted the error case to the http://argouml.tigris.org.I think,it is as quickly as possible,I get the answer from this open source engineering project group.I have gotten two replies from this group since yesterday afternoon.It is making me happy.I feel this software maybe grow persistently.

  I think I can contribute this project in my way from my own standpoint.