Wait, why is your Blockland folder in such a weird location?
C:/Users/Owner1/Favorites/Documents/Blockland
Right click on your Blockland shortcut and then click "Properties".
Click the tab at the top that says "Shortcut".
You should see a field called "Target". Replace Target with this:
"C:\Program Files\Blockland\BlocklandLauncher.exe" -profilePath "C:\Blockland"