The Maschine JAM is not the same as a Maschine and does not includes the same software. I don't recall it including any software tbh, but maybe Maschine?
As far as browser previews goes, please look to this support article.
https://support.native-instruments.com/hc/en-us/articles/115005154789-I-Cannot-Find-the-Native-Browser-Preview-Library-for-KOMPLETE-KONTROL-or-MASCHINE