The reason for the title of this query is that in my install of Spider Calendar, it states that the version number is 2.5.13, and on the Webdorado page, the latest version is 1.4.11.

Spider Calendar Personal (WordPress) Purchased on December 18 2014
WordPress 3.0+ SpiderCalendar_WordPress.zip Version: 2.5.13

Thanks in advance for any help
Nils

Dear Nils Inge,

Could you please give us the link (or a screenshot), where you see the version as 1.4.11?
Thank you.

wordpress.org/support/view/plugin-reviews/spider-event-calendar

Dear Nils,

Please be informed, that we have made updated of the pro version of Spider Calendar, that is why your version is higher than the one listed on WordPress.org.

Thank you.