Version 2.1.2 has been tested with WordPress 3.1 and eShop 6.2.8 successfully. Enhancements in this version include:

• Added Elegant Themes eStore compatibility
• Enhanced support for GMT dates after being mangled by Excel
• Improved thumbnail search algorithm
• Fixed two small upload file validation bugs
• CSV Imp will now deactivate CSV Export if present, to prevent class collisions (classes also renamed)
• Improved support of other CSV file formats (ie semi-colon instead of comma as used in France, Europe, Chile, and South America)

Read more about the plugin here.