Prerequisites
A Java Virtual Machine with version 1.8.x.
A Java Virtual Machine (JVM) is required to run the client. The version must be 1.8.x. The client has not been tested with JVM 1.9.
To check the JVM version use java -version. For example
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)
Check the output for 64-Bit!!!
Disk Space
The database for the Ethereum Classic chain takes approximately 15G of disk space. Appropriate overhead will be needed for the chain to grow into the future. An SSD of at least 25G is recommended.
Memory (RAM)
The mantis client has been tested extensively on EC small instances with 2G of RAM. This is sufficient to run the client and the miner.
Downloads
The Client Binary
This client is distributed as a zip archive and can be downloaded from the releases section of the github repository.
The Bootstrap Database (Optional)
A bootstrap database has been created to allow users to shortcut the process of syncing the client for the purposes of testing.
This file is available for download at
mantis-cli-beta1-bootstrap-db.zip
Checksum the Bootstrap Database Archive
When the file is fully downloaded run the following command
CertUtil -hashfile mantis-cli-beta1-bootstrap-db.zip MD5
This should result in a line identical to the following ...
3a7bceeb1816de2e481d6a280c73e4e1 mantis-cli-beta1-bootstrap-db.zip
Compare the results of the line on your terminal to the above line, the checksum should be identical.
The default folder for data is %HOME%\.mantis. In order to use the downloaded database create this folder and cd into it. Then unzip the file using...
unzip <path to zip file>\mantis-cli-beta1-bootstrap-db.zip
Install the Client
Unzip the client archive file downloaded from the previous section. This will create a folder structure as follows -
mantis-0.3-cli-beta
│
└───bin
│
└───conf
│
└───lib
The lib folder contains all the jars required to run the client, the conf folder contains the configuration files needed to alter the user settings of the client and the bin folder contains the scripts to start the client.
Run the Client
From the mantis-0.3-cli-beta folder use
bin\mantis.bat
This command will run the client with settings as dictated in the conf folder files.
Changing the Default Settings
Following the instructions outlined above including using the bootstrap database should result in a startup similar to the following

The first block should be around 4.1 million as this is where the snapshot was taken. If you have not used the snapshot database the block count will begin at 0.
The default datadir is %HOME%/.mantis. To change this edit the storage.conf file in the conf folder.

Un-comment the datadir configuration and replace the value with the preferred value.
datadir = ${user.home}"/.mantis"