Thank you very much! This is clear now.

Unfortunately however, it seems that I was too quick to declare that I installed without any problem. Now that I try to do a test checkout, I receive the following in step 2 of 3 (Payment Information):

Your Total
1146 Table 'zc_store.TABLE_LOCAL_SALES_TAXES' doesn't exist
in:
[select local_tax_id, zone_id, local_fieldmatch, local_datamatch, local_tax_rate, local_tax_label, local_tax_shipping, local_tax_class_id from TABLE_LOCAL_SALES_TAXES where zone_id = '']
Have you seen this before? What could be causing this?