Pull variable from different file

I’m running a CB3 with regular polyscope and I’m trying to get a variable from a different installation file. I know you can use the ones in the current installation file, but is there a script command that allows me to pull from any file?

I’m afraid that I don’t think you can share variables between installation files. I would think you would need a custom URCap which saved variables to a file or something similar, in order to share values between installlation files.