We have just moved to running OpenLP (2.4.6) on Windows 10, with Impress (LibreOffice 5.3 as far as I remember) on our church PC. When setting services up at home, I have noticed that Impress doesn't always render pptx files correctly when showing them as slide shows, even if they look ok in edit mode. So, I decided to install the powerpoint viewer on our church PC (as the new PC didn't have MS Office - the old one had MS Office 2010, or possibly 2007).
Now, having selected both Impress and PPT Viewer as presentation options in OpenLP, I found that loading pptx presentations gets to a certain point and then stops. (May be similar to this - https://forums.openlp.org/discussion/3371/opening-a-presentation-takes-forever/p1 ). I then have to use Task Manager to stop OpenLP. The same happens if I only have the PPT viewer option ticked. However, if I only have Impress ticked, the same file loads with no problems. This seems to affect every pptx file - I didn't get the chance to try any ppt files.
Is it worth installing the full version of Powerpoint? If so, what version - we have a license for Office 2016, but from looking through the forum it appears that this may not work too well with OpenLP.
Am I also right in thinking that only the 2007 and earlier version of the PPT viewer work correctly (at all?) with OpenLP? We only had the 2010 version available, so that is what I tried to use.
Any help is much appreciated.