Add New Users Plugin stuck on update 1.05

My installation of the Add New User Plugin is stuck on version number 1.05. I downloaded, uploaded and activated version 1.06 and it still showed version number 1.02. I located and deleted the 1.02 from the mu-plugins folder folder and the listed version is now 1.05. I used the auto-update option, it showed that it updated correctly but still shows version 1.05 with the option to auto update.

After deleting the folder and re-uploading I am stuck. What are my next steps?