upgrade 1.5.24 to 1.5.26 and 2.5

Since I upgraded to 1.5.26 joomla 1.5.24, enable jupgrade but not complete the upgrade to 2.5 (see attached) Will the jupgrade I have is not compatible with Gavick models? You will have to understand jupgrade with appsite template?
I downloaded the jupgrade of joomlaspanish.org...

Appsite template has two versions: one for J1.5 and second only for J2.5 , so after migration you should install a new version of template suited to your version of Joomla.

Jupgrade is not our extension, so you have to ask producers ( redcomponent.com/redcomponent/jupgrade). jUpgrade is a migration tool designed to assist administrators in moving the contents (not template) of their site into a new Joomla! 2.5 installation