A printer driver causes a computer to function as: an image formation data generator configured to generate image formation data which includes image data and other data; and an image formation data updater configured to update the image formation data. The image formation data updater is configured to update the image formation data by: judging whether or not a description to secure compatibility of a version of the image formation data exists in the image formation data; if the description exists, adding to the other data an enabling instruction to enable a compatibility securement function to secure the compatibility of the version of the image formation data; and if no description exists, adding to the other data a disabling instruction to disable the compatibility securement function.