FeildLink v6.1 has been released on 10/8/21 for install via Trimble Installation Manager (TIM). Please see the support article about installing updates via TIM if you need help updating FieldLink.
Trimble Field Points Installation through Trimble Installation Manager

The updated User Guide for this version of FieldLink can be downloaded as part of the install process using TIM.

To see an overview of the latest updates in FieldLink please review the attached release notes.