Thanks for sharing. There's little reason to export at 4K, despite the 'auto-match' suggestion. Change it to 1920 x 1080 in the export resolution box. That res matches most of the source files.
Audio was low, so the AMPLIFY effect was used to raise the level 300%. One 'noise' was removed. There were several video gaps, which were closed. (Right-click | CLOSE GAP). Gaps are easy to spot in Storyboard mode (video track 1 only).
No problems exporting with the latest version. For licensed users upgrades are free for up to six months from purchase date. After that, VP will continue to fully function but a fee will be required in order to register the newest. Retain your old install file and registration info.