I’m really sorry the latest update did not work for you.
However, I can’t understand, why you give a 1-star-rating without giving a chance to fix the occurring issues. If you develop a software in your free time which is used by more than 50.000 sites, you can’t be aware of all possible configurations. So I am reliant on the communities feedback to consider all imaginable possibilities and would be appreciated if you could post some more information:
- After upgrading, I found that the tabular overview was dropped from the dashboard: If you updated to 0.10.0.3 (not 0.10.0.4 which already contained a fix), the settings were not transfered from your old version. So you had just to re-enable the overview.
- irritating and unnecessary messages appeared: Do you talk about error messages and PHP notices? Or about messages shown by WP-Piwik itself?
You can also use the support forum: https://www.ads-software.com/support/plugin/wp-piwik