After purchasing Labomba from ThemeForest, you can download the theme files by navigating to ThemeForest > Your Account > Downloads.
There you can find all of your ThemeForest purchases. Locate the purchased Labomba, click on the download button, then select the installable WordPress file only. The file can be directly uploaded to install the theme.
If you prefer to download the whole package (all the files that related to the theme such as installation files, demo xml, documentations etc.), select all files & documentation to download. Extract the downloaded package to get a theme file that will be used for installation (labomba.zip).
What You Get In The Package:
TIP: Keep the downloaded file in a safe place as you are going to upload the file in the installation section.