We are really sorry if you are seeing these additional files on your PC. These files with a ._ at the start of the file name are known as residual files.
Residual files can sometimes appear on a PC, when the files themselves have originally been created and zipped on a Mac. We do test all of our files on both PC and Mac before any of our products go live, however we are unable to test these across all versions of PC, so our apologies that these residual files are appearing for you.
You can certainly delete these residual files, without affecting your DC resources, as they are not valid files. The quickest way to do this, would be by using the File Explorer search bar and typing in ._ This should bring up all of the residual files together, so that you can remove them in one go, rather than having to go through each of your folders.
We hope this helps, however please do get in contact with our Support Team if you are experiencing any difficulties with your downloads and we can certainly help!