> I'm afraid to install the newest modules on the new machine in case there are incompatibilities
Don't be a 'frady cat. No matter what you use an environment - docker, perlbrew, virtualbox, etc - see how far you can get with just a test environment; installing the packages from CPAN or, better, the local package manager. Fix your code where you need to. Once you get that working, your life will be a lot simpler and you'll see how silly being "afraid" actually is. I'd rather be seeing you post questions here regarding the fixing of your code than to enable you to just live in some false sense of fear.
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