Question about license for Quartus Prime

Even if both of Std version license and Pro upgrade license are expired, can we use those as Pro version? - Yes, you can still use as PRO license. The agent Macnica told us that if Std version license is expired, we cannot use those as Pro version. - You can still use the permanent feature: example Quartus feature. But for the feature that has expiration date, it will expire, and need to purchase new if you want to use this feature again.