It is not currently possible to export and import a run property set in Data360 Analyze.
This is a roadmap candidate for this enhancement but it has not been assigned to a target release at this time.
If you have the information available in a legacy lavastorm run property data (.brp) file then you could import the .brp file into an Analyze data flow to create a corresponding Run Property Set, see the documentation here:
https://doc.infogixsaas.com/analyze/Default.htm#d-advanced-topics/run-property-sets.htm#Importin
Analyze enhancement request ref. LAE-24047