don't use pset. just use nvault_set if you want to be able to clear all entries. pset is for more like identifiers, or notes or things that you don't want to get rid of. Hence p(ermanent)set
In answer to your original question. If your data is saved using nvault_set just use nvault_prune(g_iVault, 0, get_systime())
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What an elegant solution to a problem that doesn't need solving....