GST NEW RETURNS OFFLINE TOOL BETA VERSION 0.5

Hello,

QUESTION 1. From which month GST NEW RETURNS SCHEME will be applicable ? ( ANNX1, ANNEX2, RET 1/2/3).

QUESTION 2. Also currently it seems NEW  RETURNS OFFLINE TOOL FACILITY CALLED BETA VERSION 0.5 is no available for DOWNLOADS on GST PORTAL, is there any technical problem ?  

I called GST Portal but they talka about SYSYTEM REQUIREMENTS.

Please help..