Still broken in Confluence 6.15.1. Deleting the Viewfile plugin cache does not work as a permanent fix.

Thanks for the reply, I've added to that request and add a comment as well.

Hi eddy5, there is not currently a conversion tool, but we do have an improvement request for one here: CONF-32097. If you think it would be valuable please add your vote there, and feel free to comment about how this would be helpful for you as well.
For the meantime, you can manually edit any old macros that you want to replace. Just edit the page, go to Insert (+) > Files and Images, and select the file.

Also what about all the content we already have in the old macro. That still breaks. Do we have to go through and replace the content with the new macro? Is that really an acceptable solution?

I don't think this method of inserting PDF files should be considered as replacement of pdf micro. With pdf micro, file can be viewed as slides right in the confluence page which is very convenient. While in new way of viewing files, file should be opened out of confluence page and some times it can't open it and says you must download it.

Hi @mahmadi, this issue is obsolete in Confluence 5.7, as we have introduced a new way of viewing files in Confluence. See this page for more information about previewing files. You can use this new previewer instead of the old viewfile macro, as this problem does not occur. Hope this helps!

What version exactly has fix for this issue? Currently we are using 5.7.
Thanks

Thank you everyone for your feedback. In a recent release of Confluence (5.7) we introduced a new way to embed, preview and collaborate on files. This new experience does not require you to insert a macro first, but automatically embeds a preview of the file if you upload it. In addition, it supports many more file types and additional features which are not available in the View File macro. All future efforts on improving our files experience will be on the new solution.
As discussed in previous comments, this bug does not exist in our new file experience and we encourage you to transition your embedded view file macro into an embedded file to make use of the new file functionality. Given that the bug does not occur in the new file experience, we will be closing this issue.

@dunterwurzacher, Hi Denise, thanks for the info! Sounds like this will work for some pages anyway.... Since the viewfile macro dies most often on pages with multiple instances, maybe the viewer can help those page authors trim down to just one.
Can't upgrade right now (collation woes), but we'll look at this soon. Have a great day!

Hi adaly! Nothing has changed in terms of file permissions, so any scenario that worked for you before will be the same now. Attachments inherit the permissions from the page they're attached to, so you can see this doc for more information.
To answer your questions specifically, the new file previewer just shows a small preview of the first page of the document, and when a user clicks on it they can navigate through the full document. They would be able to download the attachment (just like before), but they would not be able to upload a new version of it. So, as before, only those users who have Edit permission to the page would be able to edit and upload a new version of the document.
Hope this helps!