We just released HF-2 for Gridserver 6.0.0. It contains a fix and a workaround for customers who have large Datasets (bigger than 1.3GB) as well as all fixed issues from previous hotfixes. Please check the release notes for more details.
The hotfix can be downloaded from customer.datasynapse.com. As a reminder, hotfixes are cumulative and we only make one hotfix jar available at any one time containing all previous hotfixes.