You have to click the full screen (top left rectangle) icon in the Bandicam software first, then record, then open the SHSO software OR open SHSO software, go to Settings and make sure you're NOT in full screen, open Bandicam, click Bandicam's full screen icon, click Bandicam's record, then select the full screen option in SHSO.
*Note- you must also have Bandicam on the "Always on Top" feature found under the downward triangle dropbox on the top right.