Q1:  Why do I get net.sf.basedb.core.BaseException: IMPORT FAILS: Invalid File format:
files supplied not appropriate for the experiment platform: [ raw data type/plaffrom] when I reun the plugin 

A1:  If you have tried to unzip a zip file,  an unzipped file directory may have been created fornthe zip file. Whilst you run the plugin again, an existing directory cannot be re-created.  

To solve this, do delete the previous unzipped directory from the file menu and the trash can. Then try to run the import again, using the same zipfile.