This new version introduce Meta Parameters which is very powerful feature. You can now control grid parameters (tempo, active bank slot, root key, scale) directly from a node, which will allow you to change the tempo in the middle of a progression for example, or switch grid entirely at some point in your composition, which is super powerful.

Full changelog here: https://github.com/emprcl/signls/releases/tag/v0.5.0

Docs here: https://empr.cl/signls/#meta-parameters