This is easy, but you need to make sure that the publish details are saved within the website and that the website has actually been previously published at least once from a Xara Desktop product.
You can only save the publish details in a Xara Desktop product. So looking at the publish settings as they appear in either of these two - check the Web Properties Dialog publish details. Not sure how to find these? Press F1 and search the Help pages for Website Publishing.
The Publish tab looks like this. You need to make sure the Save Publish settings in document box is checked...
Now publish the website document and then save it to your cloud drive. Make sure it’s the same cloud drive that you have linked to your Xara Cloud account. Now you can open the file from the cloud in Xara and work on it.
When you want to republish - tap the Share button, then Re-publish…
Then enter the Password - that’s the FTP Password, click Publish and the updated site will be published. You will only have to enter the password once per session.
Note: Xara can't reset your hosting details - Please contact our resell partner Magix (who managed domains and hosting) and they should be able to fix this for you. You can contact them here: https://support2.magix.com/customer/en
Remember that by using cloud storage like Dropbox as your document repository you're ensuring that you and your shares are always working from the most current and up-to-date version of your document!
Pro tip: Annotate your docs and get feedback from others using the Comments feature in Xara Cloud.