Hello,
You can update the plugins in Appearance > Install plugins.
If you have any problems (these problems are often caused by the host security or size max size limitations) you can upload the recent version of the plugins from this forum profile and install via Dashboard > Plugins or FTP.
1. Make the full backup of your site.
2. Deactivate and delete the current version.
3. Upload the new version from your portfolio on this forum.
4. Upload and install.
Best Regards