I guess so since they left in 1905. You could try emailing A. Conovaloff, the creator of a website about the Molokans around Kars.
http://gecko.gc.maricopa.edu/clubs/russian/molokan/
There is nothing much in Selim now worth seeing, any church that existed is long since destroyed, though there may still be some old houses (but I doubt it). The railway station from the Russian period is still standing.