More sober themes like you'd expect at work are usually part of or available for the apps you'd use at work, like Office. In my experience & FWIW graphics/imaging pros are not going to use templates, so most graphics apps that include them are going to be more consumer oriented, meaning themes more appropriate for grandma & grandpa than any office. Just a quick note in case it helps those looking for more pro-type results. But again, this is for more biz oriented stuff - for many the prices may not be realistic for home use.
#PHOTOINSTRUMENT KEY 5.4 UPGRADE#
If you're on a tight budget you can sometimes find older versions of Corel Draw! for a much better price, & also check out the actual requirements for upgrade installs. already, but want to do pro biz versions of the projects Picture Collage Maker Pro create, & much more, you might want to check them out. Illustrator is perhaps king of the hill, while Corel Draw! is much more accessible for average humans, & includes loads of artwork & templates. Vector graphics are harder to work with, create, & edit, & vector graphics apps have seen a bit of a decline in popularity since their smaller graphics/image file sizes became much less of an issue years ago.