This is the standard Windows "Find" utility. I've added bold red numbers to indicate the steps to follow. First, type the name of any one of your Lytec data files in the "Named:" box (1). For the example I used "JkDemo03.dat". Next, click the triangle at the right side of the "Look in:" box (2) to pull down the scroll bar, and scroll the list up to its top to highlight "My Computer." Click that and the box will then look similar to the screen shot but without the list of files found. Be sure the "Include subfolders" box is checked, but you should not need to do anything to make this happen. Step 3 is to click the "Find" button. The utility will search your entire network and display a list of the files it locates (4). If you see more than one file in the list, use the one with the most recent "Modified" date (5th column in the list; I failed to follow this rule when creating these examples). You can see that the "In Folder" column of this list (4) has dots, indicating that it could not show the entire folder name to you. The next steps will correct this, making the column wide enough to show the name.
First, move the mouse pointer to the vertical bar that separates the "In Folder" and "Size" headings on the title bar of the list, and note that it changes to a cross with arrowheads on its horizontal bar(5). Hold down the left mouse button and drag this bar to the right as indicated by the red arrow above.
This expands the column(6). Drag it until the dots disappear and you can read the entire folder name (7). Write down that full folder name and send it along with the files; this allows Kyle to customize the returned file package to go automatically to the right location. Now click the "X" in the upper righthand corner of the Find dialog to close the utility.
The next step is to click on the "My Computer" icon on your desktop, and navigate down the tree of folders until you reach the folder you just wrote down. When you get there you will see a large number of files whose names end with two numbers and ".dat" such as "JkDemo01.dat" and "JkDemo08.dat" (although the first part of the names will be different for your practice). Click on the "View" choice from the menu bar, select "Detail" from the pull-down menu, then put your mouse pointer on the "Type" column title bar and click it to sort the display by type and pull all of the "DAT" files together. Then go back to the "View" menu and choose "List" to see the files displayed with small icons. You're now ready to compress all the files into a single package to send to Kyle.
One of the options in this menu is "Add to Zip" (11). Choosing this one brings up WinZip, all ready to copy the selected files into a new or existing compressed file. Your context menu won't look exactly like this one, unless you've installed the same set of utilities, but the WinZip lines will be in approximately the same locations. See the WinZip help file itself for detailed instructions on using the utility; in general, the suggested options that come up automatically will be adequate for this purpose and all you'll have to add will be a filename to assign to the compressed file. It's best to use your own name for this, to prevent confusion at Kyle's server!
That's the process. Good luck!