You don't use Navicat to export a spell file...  There are several spell file utilities available.  There's one on Georges web site, you can do it with Null's Spell Editor, and there's a perl script in the utils directory where you downloaded the server source. 
 
As a side note, I've exported and imported tables with Navicat and had no issues.  It doesn't dump them in a very efficient manner though.  I prefer SQLyog for that. 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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