According to Merlins change log for the 55 release. Although I do see from your link your looking at a different site then I am.
Asuswrt-Merlin Changelog
========================
378.55 (xx-xxx-2015)
- NEW: Merged with GPL 6065. Notable changes from Asus:
o New token-based webui authentication (more secure)
o OpenVPN certificates moved to JFFS2, saving nvram.
key/cert fields will show up empty on the webui,
any new key/cert you paste will be written back
to /jffs/openvpn/ .
o New network client list on the network map
o CTF support for PPTP/L2TP WAN (Russian ISPs) (ARM)
- NEW: Reformatted DHCP lease list under System Log.
- CHANGED: The JFFS2 partition is now always enabled, as it is
required by various firmware functions. The options
to format it or to enable/disable user config/scripts
remain configurable.
- CHANGED: Updated OpenVPN to 2.3.7.
- CHANGED: Updated OpenSSL to 1.0.2b.