@Danycaz
The theme update overwrites only parent theme files. Child theme is independent to this process. If you are using a child theme, you do not need to de-activate it.
Follow these steps:
1-Delete Tower theme with files / Or go to wp-content/themes folder via ftp and rename current Tower theme folder (the parent). So you will have a backup of the older version.
2-Go to WordPress dashboard > Themes > Add New, import the new version.
If you want to do a backup of theme (child theme is included also) , go to Import / Export (Dummy Data) > Export options and save it as a backup.
Anyway the changes you made on your theme and child theme are saved into the database, so they are secure. Only the theme files need to be saved when updating ( in case you have changed them).
