I have read elsewhere (here?) that SpectraLayers Pro 7 is included with Vegas Pro 18 - is this true for upgrades too? I did not receive an SL Pro 7 activation code with my purchase but did get SForge Pro 14 + 'wizardFX' & 'Boris FX' as part of the bundle.
SpectraLayers Pro 7 was part of the new release offer for Vegas Pro. It was applicable for new and upgrade purchases until 29 September 2020. Please see page 5 of the VEGAS Pro Price Watch thread:
for the inclusions applicable at various times based on your purchase date.
The WizardFX and BCC inclusions were offered with Vegas Pro for purchases made in late November some 2 months after the SpectraLayers Pro 7 offer had expired.