Sometimes Medal needs extra permissions from your computer in order to run properly. You can run Medal as admin by right-clicking the Medal.exe shortcut and choosing run as admin.
You can choose to always run as admin by doing the following:
1. Find the Medal.exe shortcut and right-click it.
2. At the very bottom of the menu click `Properties`
3. On the box that pops up, click the `Compatibility` tab
4. Click the box that says `Run this program as administrator`. Click Apply and OK.
5. Start Medal and enjoy!
*If you are still having troubles, please create a ticket