Step 1: Log into your hosting space via an FTP software like File Zilla.
Step 2: Unzip the kt-aaron v.x.x.zip file and use only the extracted kt-aaron theme folder
Step 3: Upload the extracted kt-aaron theme folder onto wp-content > themes folder.
Step 4: Activate the newly installed aaron by going to Appearance > Themes, find aaron and click on “Activate”button