In May 2017, CCP converted PLEX into smaller increments. All existing PLEX were converted to 500 of the new PLEX (which are exclusively referred to as PLEX in-game, rather than Pilot License EXtension, though the acronym meaning remains unchanged). 30 days subscriptions now cost 500 PLEX, effectively the same cost as previously. The previous premium currency, Aurum, was retired and converted to PLEX at the same exchange rate as PLEX could be exchanged for Aurum previously (1 old PLEX per 3500 Aurum, so 1 new PLEX per 7 Aurum), provided the account had at least 1000 Aurum to convert. All items in the premium store that used to cost Aurum now cost an equivalent number of PLEX. This allowed CCP to market more granular deals on PLEX, as well as price certain services for PLEX with more granularity. For example, Multiple Character Training used to cost 1 PLEX, the same prices as 30 days of subscription time, but now costs 450 PLEX, 90% of the cost of 30 days of subscription time. In the same patch, CCP also introduced the PLEX Vault, a safe and secure way of moving PLEX around in-game without risking the item being lost if one's ship were destroyed.