For those that want to set up a Sling masternode easily in Windows, try this - it is quick:
1. Download the Sling wallet (only from the OP), let it sync
2. Go to Settings, Encrypt Wallet and follow the instructions (the wallet should close after this)
3. Re-open the wallet and go to Help, Debug Window, Console
4. Type 'masternode genkey' and copy and paste this output to notepad
5. type 'getaccountaddress 0' and copy and paste this output to notepad
6. Transfer 7331 Sling to the getaccountaddress output from above, wait 15 confirmations (you can view this by clicking the Transactions button and doing a mouse-over of the transaction)
7. Close the wallet
8. Use
http://www.canyouseeme.org/ to determine your IP and copy and paste this output to notepad (make sure you have a stable connection to the Internet and inbound firewall/router mappings open port 9999)
9. In the 'C:\Users\<YourUserName>\Appdata\Roaming\Sling' folder,
create the text file sling.conf with the following:
maxconnections=100
rpcuser=<Whatever>
rpcpassword=<Whatever>
rpcport=9999
port=9999
gen=0
server=1
daemon=1
staking=0
reservebalance=9999999
masternodeaddr=<YourIP>:9999
masternode=1
masternodeprivkey=<The output of masternode genkey from above>
rpcallowip=127.0.0.1
10. Re-open the wallet and go to Help, Debug Window, Console
11. Type 'masternode start "<Your passphrase for unlocking the wallet>"' and do this a second time and the icon will unlock
12. If all goes well, there should be no errors (otherwise check debug.log) and the wallet will bring you joy so leave it open!
PM me if there are any problems, I can update the instructions.
PS: 'masternode count' in the wallet currently shows only 19, so the payout is good. You should see your IP with 'masternode list'