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This link takes you to Google Drive in a browser, where all the files are available for download. The browser interface works best if you sign in to your account.
The CSPM files need the matlab => spm12 folder, which contains SPM12, toolboxes (like SUIT), and CSPM (in matlab => spm12 => toolbox => CSPM).
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Old way
(obsolete) Usual
Normally, if you have Google Drive running:
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