Also, even basics of SEO are missing.
In the long term, the largest number of visitors come from Google searches. I assume you want “windows file encryption” lead to your website.
- change the domain name to fort.windowsfileencryption.com
- lacking that, your landing page should be www.cryptoextension.eu/windows-file-encryption and “/” should be a perm redirect to that
- “windows file encryption” should be present in h1 tags
None of that will magically teleport your site to #1 of those searches, but it should improve things.
Read Google’s SEO starter https://support.google.com/webmasters/answer/7451184?hl=en (and implement those suggestions).
Content marketing is also missing.
Put as much content about encryption and files as you can think of.
Putting the manual as html (as opposed to PDF) is a no-brainer.
Your tool can encrypt onedirve, dropbox etc. files. For each service write a page like /encrypting-dropbox-files-on-windows.html which is a step-by-step tutorial on encrypting dropbox files with your tool, with screenshots.
Write a page for every file type. /encrypt-pdf-files-on-windows.html. /encrypt-png-files-on-windows.html Obviously every article plugs your program as a solution for encrypting those files.
Those are ideas from someone who knows nothing about this space. You’re an expert. Think about all the encryption related topics and write about them. Promote those writings in appropriate forums. For example, maybe a comparison of various encryption algorithms. Or a visual guide to encryption that you can promote on HN or some sub-reddit.
You have competitors. For every competitor Foo write /front-vs-foo-file-encryption-comparison.html where you describe how your stuff is better.
Look on quora, stack overflow etc. for encryption related questions. This is a good way to find inspiration for encryption-related content that you can write about.
And yes, the website could use a facelift. Lacking refined design skills myself my approach is to find great looking site close in structure to what I want and mimic it.
Add manual next/prev navigation to screenshots. Auto-flipping screenshots are infuriating.