Neo4j Desktop 1.6.0 introduces restrictions on third-party graph apps due to limited usage and increasing maintenance costs. The restricted apps include Semspect, Graphlytic, yFiles Neo4j Data explorer, GraphXR, and Neo4j Commander 3. These apps will no longer be signed and verified as trusted by Neo4j, and installation via certain methods will not work. However, Neo4j Labs Graph Apps will still be available pre-installed in Neo4j Desktop 1.5.9, and users can access them through the Gallery App or file protocol. Users who need to use third-party Graph Apps are advised to consider alternatives such as using Neo4j Desktop 1.5.9, SemSpect, Graphlytic, yFiles Neo4j Data explorer, or reaching out to developers for custom solutions.