In some instances (for example, if a new style has been uploaded but you can't see it) it may be necessary to clear your Office cache so the add-in displays the most recent changes. You can do this using the following method:
WINDOWS:
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In Word, navigate to File > Options > Trust Center > Trust Center Settings > Trusted Add-in Catalogs.
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Select the checkbox Next time Office starts, clear all previously-started web add-ins cache.
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Quit and restart Word, then open the addin. You'll be asked to log in again, then you should see the most recent changes once the add-in loads.
MAC:
Open the Sciwheel Word add-in, then in the right hand panel, click the "i" symbol near the top right, and choose 'Clear web cache':
Then close and reload the Sciwheel add-in.