Board Thread:LotR Mod Technical Support/@comment-141.134.216.229-20150726001224/@comment-25533095-20150727113303

Well, if the last time you were playing was in 2014, quite a few things have changed since then, and some require more PC resources, It's the natural course of modding. Go to your launcher, click "Edit Profile" on your Forge profile, and set the "Xmx1G" to "Xmx2G". It should fix your problem.