from the last version availabe (2.6.3 - Added on 2017-04-30)
the plugin is available to be enabled on the ‘Configure Map’ option.
on the ‘Download Map’ options the ‘Contour Lines’ still available to be downloaded
Also the ‘Hillshades’ 
OsmAnd~ here
not the first time they charge money for something on the play$tore but we enjoy it for free in F-Droid