Backward File Compatibility:


File Version(s)    Backward Compatible Version(s)
v19    v18
v18v17, 16, 15, 14, 2.3
v17v16, 15, 14, 2.3
v16v15, 14, 2.3
v15v14, 2.3



Forward File Compatibility:


File Version(s)    Forward Compatible Version(s)
>v2.1v2.2, 2.3, 14, 15, 16, 17, 18, 19
<v2.1v2.2, 2.3, 14, 15, 16, 17, 18