You can get the latest version of GrassBlade LRS from "My Account" page.
Step to Upgrade:
1. Take a backup of current files and database.
2. Overwrite the files with files from the new version.
3. To upgrade the database go to http://<www.yourdomain.com>/grassblade-lrs/Configure/Database/?upgradeTables=18.104.22.168
Make sure you replace <www.yourdomain.com> with your actual domain. Ignore any error messages.
You are done.
If things don't work. You might need to copy the following file from your old installation to the new installation: