by Steve Grisetti » Wed May 09, 2018 8:25 pm
If the project was created in version 7, you definitely need to finish it in version 7. You can open older projects in newer versions of Premiere Elements.
That said, older versions of the program (like version 7) needed to activate components (like the MPEG component) which were provided by third-party sources (in this case Main Concept). This they did automatically the first time you used them by contacting Adobe or Main Concept over the internet.
Unfortunately those web links went away a very long time ago. So there may be no way to activate the component necessary to produce a DVD from version 7.
One possible solution is to install the free trial of version 2018. This will install the current MPEG component, and version 7 might well be able to use it.
The other solution is to just output your finished movie from version 7 as a DV-AVI. You can then load this finished movie into version 10 and use version 10 to author and output your DVD.
But installing codec packs won't fix things. In fact, some codec packs can actually damage your system by overwriting standard codecs with similar but not standard codecs. So, although the K Lite codec pack is pretty benign, as a general rule it's best not to go tinkering with the codecs that are installed by the programs you're editing with.
HP Envy with 2.9/4.4 ghz i7-10700 and 16 gig of RAM running Windows 11 Pro