Ghost Blog has been added to Softaculous! So you can install it via there, but currently the only way to make changes to Ghost or install new themes is to restart Ghost. On Shared hosting this can be a bit of an issue, but if you follow these simple steps then it shouldn’t be any issue.
Step 1. If you do not have it yet, get SSH Access on the server, you will need to contact Support for assistance with getting SSH.
Step 2. Login to SSH. Once logged in you will be greeted with: Learn More