SGP 3.1 and Primaluce Eagle 2 and 3

Need help with this. I’ve followed the instructions to the letter above. The problem is that I can’t get passed the screen on update for migrating apps and files as it’s greyed out. This is usually a language issue. I have tried a US install and a UK install. I have set all language features and have done all the trouble shooting steps on this web page

I have payed for a key on eBay as suggested and this wouldn’t work. I found a key on this page https://www.windowsfeed.com/2016/08/windows-10-product-keys-serial-keys.html which worked but only one will work. Feeling pretty exasperated as I’ve been trying to sort this out for 8 hrs straight with no success all so I can access SGP again which now won’t load as it’s asking for .net 4.72 +
What do I try next?