If you see an error upon opening Splice INSTRUMENT stating "You're using an unsupported version of Splice INSTRUMENT. Please update immediately to a supported version. Update Now", this means the platform has identified you are running an old version of the plugin that has been deprecated and is now out of support.
It is recommended you update to the latest version of the Splice INSTRUMENT plugin at the earliest, to prevent any possible issues loading projects or working with your packs.