Backup your files and database.
# stash any local changes in your site that aren't committed yet
git stash
# fetch the release you want to update to, ie: 8.02
git fetch origin v8.02
# update the code in your site with that release
git rebase v8.02
# restore your local changes
git stash pop
Make sure the folders that need to be writable are writable by the web server
Login to your website and go to the admin side, click on the Modules menu heading. Do not click on any of the menu entries under Modules, click on the heading itself.
In the list of installed modules, click the circular arrows on the row where Formulize is listed:
On the next page that appears, click the Update button at the bottom of the page.
Go to the main admin page for Formulize. This is accessible from the Modules menu.
If a database update is required, there will be a large message about this on the screen. If no update is required, then no message will appear.
If there’s a message, click the Apply Database Patch for Formulize button to update the database.