Question regarding vB3.x and vB4.x import

When I try to:

D. Go to your ADMIN CP > 'Plugin System' > 'Manage Products' > Click on [Add/Import Product]

• vB3.xBrowse to the 'docs' folder of the installation package and open 'crawlability_vbseo_vb3.xml', Click 'Import'.
• vB4.xBrowse to the 'docs' folder of the installation package and open 'crawlability_vbseo_vb4.xml', Click 'Import'.

The system says that it is already imported when I try to import vB4.x.
Since the readme does not say anything about not importing both I guess there is a bug - or am I wrong?
I am using vbulletin 4 (publishing version) and vbseo 3.5

You should ONLY import the vb4 version. The vb3.x version is for vbulletin 3.8.5 (and lower) vb boards. If you imported the vb3 version, you need to re-import the vb4 version, and make sure you check the "allow overwrite" box so it will overwrite the vb3 product.