I had to reinstall windows and thereafter anaconda. The old environments are still there, in the right place, but the new installation does not recognise them. How can I reactivate those environments in the new installation?
OK, so it seems my problem was that Anaconda actually installed to a different location than before and therefore was not seeing the environments.
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Hey pjbn1, glad you were able to troubleshoot this problem on your own so quickly. A new Nucleus feature that you may be interested in is backing up your environments to Nucleus. This allows you to upload it to your Nucleus account and reinstall it anywhere you’d like. Here’s a set of instructions on how to use this new feature 
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