Dear, I’ve followed this for have a clean installation of both version of sen2cor but nothing still change.
If I use 2.5 appear for a few seconds a progress bar; after this nothing is seen in SNAP. If I use 2.8 it seems there are no action after I click “Run”.
I continue to read the other instances but I think that is veryconfusionig. If you know that there is a post in which someone have published the procedure so plaese stick it into your next comment.
I am on Windows 10