You can get the latest version of GrassBlade LRS from "My Account" page.
Steps 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=2.2.1
Make sure you replace <www.yourdomain.com> with your actual domain. Ignore any error messages on Step 3. This step might take a while for large databases.
You are done.
If things don't work. You might need to copy the following file from your old installation to the new installation: