I've upgraded my STW account to a paid (basic) account and changed the setting in WP-Portfolio. The Free version works, but when I switch to Paid, it gives a string of WordPress database errors.
Based on the FAQ I deactivated and reactivated the plugin but the problem persists when in Paid mode.
The plugin version is 1.26
The portfolio is installed here: http://www.sandstonedigital.com/professional-web-site-design/portfolio/
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