Hello.

"Is it possible in the latest version to add or edit a blogpost directly on the web (like Joomla and Wordpress)?" - no.

"Or do I always have to do this locally" - yes.

Miranda, if you are using a very old version that should be reason enough to upgrade. Some older versions infrequently suffered catastrophic failure and loss of whole projects, I do hope you are regularly making an iwzip through step 5, export project (and renaming then so you have multiple fallback positions).

In the past I have used the free Blogger. This can be included in your project by simply adding some code (provided by blogger) to your project in an html object. Your blog can then be managed outside of WX5.