IMPORTANT:
This is a new testnet chain.
Before running v13
Delete your .kore-testnet folder in Home for Linux
In Windows:
Delete this registry or folder key before running v13

[HKEY_CURRENT_USER\SOFTWARE\KORE\KORE-Qt]
"strDataDir"="C:\Users<< username >>\AppData\Roaming\kore-testnet"

or

[HKEY_CURRENT_USER\SOFTWARE\KORE\KORE-Qt-testnet]
"strDataDir"="C:\Users<< username >>\AppData\Roaming\kore-testnet"



changelog:
1) Updating default onion address
2) Changing the Height to Fork to 500
3) Locking Transaction split into two ( minimum 1100 KORE each )


Select a compiled Linux 16.04, Windows 64 or the Source here.
https://github.com/Kore-Core/testnet-kore/releases/tag/v0.13.0.13

Linux compilation instructions here:
https://github.com/Kore-Core/testnet-kore/blob/master/README.md


OSX:
Working on it...