I am trying to Upgrade from the jsjobs 1.0.5.8 beta - r to the jsjobs 1.0.5.8.

I uninstalled jsjobs, downloaded the 1.0.5.8, uploaded and installed it but i still see "Version : 1.0.5.8 beta - r" on the information tab.
I tried again and again but the same happens everytime (same behavior occurs with or without the backup option turned on).

How can i upgrade it (with an automatic or manual backup of the data)?