I installed OT_Ante_quickstart_j25 and everything was fine. In the joomla administration panel I saw that there was a new virtuemart available update.
I updated the virtuemart installing these two files:
and the theme colors disappeared. In the theme settings I chose some other color, such as green, blue or orange, none works. When I checked the css of the page I noticed that only uses layout.css and doesnt use green.css or other colors.
I performed the update twice (with a backup) and obtained the same result.
I dont know if I need to do any other settings.