Hello Maurice,
Please find the answers to your inquiries below:
1. JCE editor: see screenshot, I cannot browse to the different blog posts. Or am I missing something?
Yep, you need to use the "Older Posts" feature in EasyBlog. JCE does not support searching for items in EasyBlog yet I believe.
2. Link to EasyBlog posts with older posts:
A. The posts that I can link to do not have the correct URL. Eg http://www.sitesuccess.nl/Blogblogblog/google-webmaster-tools-account-website-toevoegen-verificatie instead of http://www.sitesuccess.nl/Blog/google-webmaster-tools-account-website-toevoegen-verificatie. Somehow it picks some "old" URL. How/where can I solve that?
Hm, not sure if I understand you here but do you mean the URL has "blogblogblog" for links generated from Older Posts?
B. Is it only possible to link to older posts or also to newly created posts?
It's only possible to link to previous posts currently.
3. Xmap extensie voor EasyBlog: when I try to download I get this message: We are sorry, but the extension is invalid. Please contact support@stackideas.com . Please help.
Hm, can you try downloading the attached file instead?
4. How/where can I underline all the links in the blogposts?
Hm, not sure if I understand you here but you can always add your custom css to enforce all links to by hyperlinks
.blog-text a
{
text-decoration: underline;
}