First of all, even we test each new version before the release, it is highly recommended to take a back-up of your site using Akeeba Backup (free) component before upgrading MijoSEF.

MijoSEF, on control panel, by showing the last and installed versions, provides us convenience to be up-to-date.

If a new version is released you’ll see a warning message saying :” There is a new version of MijoSEF available for download, please update now!”.
upgrade   upgrade 1
Automatic Upgrade
Thanks to this feature, you don't need anymore to download the new version and upload it to the Upgrade page each time you want to upgrade. MijoSEF will automatically download the new version and do the upgrade procedure itself.

Do not forget to enter your Personal ID in MijoSEF => Configuration => Main tab if you've purchased Plus, Pro or VIP version. Then you just have to click on the Upgrade button.
upgrade 2
Manual Upgrade
Firstly you should download the last version of MijoSEF then login the administrator area of your website. Go to MijoSEF=>Upgrade, browse the downloaded file then click on “Upload File & Install”.

That’s it, MijoSEF will be upgraded and we’ll see a message saying: ”MijoSEF upgraded successfully”. Now we are using the last version of MijoSEF and the message on Control Panel is saying that: ”You've the latest version installed.”

Note 1 : If you recieve any red message after uprading it means that MijoSEF is not upgraded. You should apply what the red message is saying, generally file or folder not writable.

Note 2 : There is no seperate file for Manual Upgrade, the installation file is also available for upgrade.

Note 3 : Nothing will be lost from your settings, statistics, extensions, data, items etc.