In some respects NCH is more beneficent than other NLE providers who offer only yearly upgrades - at a price. Videopad updates are free for six-months.
Plus, the unlicensed versions can be test driven indefinitely, though some features are limited.
Just now tested the 'free' v8.45. The newer split-screen behavior was available, though it might not be later. If Mp4 export is unavailable, AVI usually succeeds.