Using active scape urine from last season
 

Is it okay to use active scrape that is left over from last season, it says it expires 2013, but is it still as fresh?

Well, it depends. If it's been kept frozen or refrigerated it should be ok. But, if it's just been setting out the active freshness only lasts about 6 months. I got this information from actually talking to an actual deer farmer that sells the urine to local stores.