import winreg 
 
RegistryKeyName = "SOFTWARE\Adobe\Adobe Substance 3D Painter\Shelf\pathInfos" 
 
ShelfName = "myshelf" #Needs to be lowercase 
ShelfPath = "C:/Temp" 
ShelfStatus = "false" #false = not disabled 
 
RegConnection = winreg.ConnectRegistry( None, winreg.HKEY_CURRENT_USER ) 
  
# Open parent registry key 
Key = winreg.OpenKey( RegConnection, RegistryKeyName, winreg.KEY_READ  ) 
 
# Iterate over each sub-key to retrieve the biggest Shelf number 
SubKeyCount = winreg.QueryInfoKey( Key )[0] 
ShelfNumber = 0 
 
for x in range(SubKeyCount) : 
 SubKeyName = winreg.EnumKey(Key, x) 
 ShelfNumber = max( ShelfNumber, int(SubKeyName) ) 
 
ShelfNumber += 1 
 
# Create the new Key and add its values 
NewKey = winreg.CreateKey( Key, str( ShelfNumber ) ) 
 
winreg.SetValueEx( NewKey, "disabled", 0, winreg.REG_SZ, ShelfStatus) 
winreg.SetValueEx( NewKey, "name", 0, winreg.REG_SZ, ShelfName) 
winreg.SetValueEx( NewKey, "path", 0, winreg.REG_SZ, ShelfPath) 
 
NewKey.Close() 
 
# Increment the Shelf path counter 
Count = winreg.QueryValueEx( Key, "size" ) 
Key.Close() 
 
Key = winreg.OpenKeyEx( RegConnection, RegistryKeyName, 0, winreg.KEY_SET_VALUE  ) 
winreg.SetValueEx( Key, "size", 0, winreg.REG_DWORD, Count[0] + 1 ) 
Key.Close()

import winreg 
 
RegistryKeyName = "SOFTWARE\Adobe\Adobe Substance 3D Painter\Shelf\pathInfos" 
RegConnection = winreg.ConnectRegistry( None, winreg.HKEY_CURRENT_USER ) 
 
#Open registry key 
Key    = winreg.OpenKey( RegConnection, RegistryKeyName, winreg.KEY_READ ) 
SubKeyCount  = winreg.QueryInfoKey( Key )[0] 
 
#Iterate over each sub-key 
for x in range(SubKeyCount) : 
 SubKeyName = winreg.EnumKey(Key, x) 
 SubKey = winreg.OpenKey( 
  RegConnection, 
  RegistryKeyName + "\" + SubKeyName, 
  winreg.KEY_READ ) 
 SubKeyValueCount = winreg.QueryInfoKey( SubKey )[1] 
 
 #Read subkey values 
 Values = [] 
 for i in range( SubKeyValueCount ) : 
  Values.append( winreg.EnumValue( SubKey, i ) ) 
 
 #Note : Values is a table of tuples 
 FoundKey = False 
 for Value in Values : 
  if Value[0] == "name" : 
   if Value[1] == "starter_assets" : 
    FoundKey = True 
 
 SubKey.Close() 
 
 #Found the path ? Then we edit the Key 
 if FoundKey : 
  print( " - Editing Windows Registry" ) 
 
  #Re-Open key in edition mode 
  SubKey  = winreg.OpenKey(   
   winreg.HKEY_CURRENT_USER, 
   RegistryKeyName + "\" + SubKeyName, 
   0, 
   winreg.KEY_SET_VALUE ) 
 
  #Assign new value 
  winreg.SetValueEx(SubKey, "disabled", 0, 1, "true" ) #use "false" to Enable that shelf path 
 
  SubKey.Close() 
 
#Finish 
Key.Close()