Several stability improvements developed during the creation of Stacks 5 were backported to this version:
Resolved issues occurring when selecting empty Library Groups or navigating them with arrow keys. Stacks (RapidWeaver plugin) 4.3.0
for RapidWeaver is a maintenance and compatibility update primarily designed to bridge the gap between Stacks 4 and the newer Stacks 5 framework. Stacks (RapidWeaver plugin) 4.3.0