REGEDIT4

[HKEY_CLASSES_ROOT\ddnet]
@="URL:DDNet Protocol"
"URL Protocol"=""

# REPLACE PATH TO DDNET.EXE

[HKEY_CLASSES_ROOT\ddnet\DefaultIcon]
@="\"C:\\Users\\YourUserName\\Desktop\\DDNetFolder\\DDNet.exe\""

[HKEY_CLASSES_ROOT\ddnet\shell]

[HKEY_CLASSES_ROOT\ddnet\shell\open]

# REPLACE PATH TO DDNET.EXE

[HKEY_CLASSES_ROOT\ddnet\shell\open\command]
@="\"C:\\Users\\YourUserName\\Desktop\\DDNetFolder\\DDNet.exe\" \"%1\""