Is it OK / safe to use the files in If it is, why is Deploy-Application.exe (36 kb) so much smaller than the one in 3.8.0? (307 kb) I am getting ready to introduce the toolkit at my new employer and would really like to have the repair items. Thank you for your time.

It is ok to do so. It is smaller because of rebranding, a huge set of icons from within the file has been replaced. Download the toolkit folder or wait for the next release that should happen this month.