MTR4 (Beta 15~) Only vetsion. not compatible with MTR3

Json changed to mtr4 format

• Optimised E231 series model
• Re-add 415-1500 series (Kyushu livery)
• DMU Sound added (provided by szandor13)

for MTR3/NTE Required version

For MTR4 (Beta 11 or above) Version

Remove Class 211 boso, nagano livery

Added Class 211 Shonan back car