No problem ??
You can upgrade to the Pro version without any issues. That said, if you do upgrade, I would recommend switching from the Period Child theme back to just the Period theme and using the Header Image feature Period Pro adds. This will make it easier to switch out the image and resize it, and there is an option for linking it to the homepage.
A link can be added to the header image with the child theme in a few steps.
First, update line 14 in header.php of the child theme from this:
<div class="custom-header-image"></div>
To this:
<div class="custom-header-image"><a href="https://google.com"></a></div>
Then replace the link to Google with the URL you want. Lastly, add the following CSS to child theme’s style.css file:
.custom-header-image {
position: relative;
}
.custom-header-image a {
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
}