GUI report RPC configuration mismatch when connect with Server

[yongpro]

GUI have follow issues, anybody fix that? The version not update for long time...:

1. newest GUI(v4.5.6-0-g9778e1d) connect to Trex v2.87 ASTF mode, report follow alarm, GUI only support STL mode?
   "Unable to connect to Trex server. Required API version is 4.6. Error: Failed To Execute Method RPC configuration mismatch -server RPC configuration: 'ASTF', client RPC configuration: 'STL'"

2. newest GUI(v4.5.6-0-g9778e1d) connect to Trex v2.91 STL mode, report follow alarm:
   "Unable to connect to Trex Server. Required API version is 4.6. Error: Failed to Execute Method RPC version mismatch: a newer client client version is required (API type 'STL': - server: '5.0', client: '4.6')

3. newest GUI(v4.5.6-0-g9778e1d) not support Field Engine for IPv6 header.