Personally I find the NOT so smart scan a pain in the backside, being more of a vehicle to promote other avast products.
In much the same way as on demand scans in a resident scanner are much depreciated as active files are scanned by the resident on-access scan.
Any of the more useful scans (previously) in the NOT so Smart Scan are available as regular on-demand scans, by useful I mean the Software Updater (in the UI > Performance section) and the WiFi Inspector (in the UI > Protection section).