You can do this with Task Scheduler. This will be much better than mucking around with the Registry which can go bad all too easily.
Disable UAC for a Specific App
Windows: User Account Control can be obnoxious when it prompts you for
approval on certain apps every time.
Tips and tricks blog MakeUseOf suggests adding frequent offenders to
Task Scheduler to avoid this annoyance.
The process is a little tedious, but easy enough if you're familiar
with Task Scheduler:
In Task Scheduler, right-click "Task Scheduler Library" and select
"New Folder" Name it whatever you would like.
Select the new folder and click "Create Task" (not "Create Basic
Name the task something descriptive. Enable "Run with highest
privileges," and select your OS under "Configure for."
Under the Actions tab, select "Start a program" in the Action dropdown
if it isn't already. Click Browse and find your app's .exe file
(usually under Program Files on your C: drive).
(Laptops) Under Conditions tab, deselect "Start the task only if the
computer is on AC power."
On your desktop, right click and select New > Shortcut. Paste
'C:\Windows\System32\schtasks.exe /RUN /TN "Name of folder\Name of
task" into the text box.
This will create a link to your program that will automatically skip
the prompt asking for permission to make changes to your computer.
The app's icon won't transfer over, but this can be easily fixed.
This solution can be used to start programs from Startup folder, if UAC intercept them (non-system programs).
Otherwise, UAC will block program (without prompt or any clue what happened) and it will never start.