Reply To: This plugin is for WordPress 3.9 or later!

I’m assuming you already installed the PTA Shortcodes plugin:
https://wordpress.org/plugins/pta-shortcodes/

Once that is installed, there will be a PTA button on the visual editor. It’s needs to be in visual mode to see that.

If you have upgraded to 5.0.3 and are now using the crappy Gutenberg “blocks” editor, then, no, you won’t see a shortcodes button, as that editor is not compatible with shortcode generators that were made for the classic TinyMCE editor. I have not built any “blocks” for the PTA plugins, nor do I have any plans to do so in the near future.

I highly recommend you install the “Classic Editor” plugin (one of the most installed plugins these days, with over 2 million active installations, since everyone hates the Gutenberg editor) so you can get back to the regular “classic” WordPress editor:
https://wordpress.org/plugins/classic-editor/