How can I get my labor rights from company with an expired license and no assets?

I have just left my previous company as I was owed around 10 months of salary across the past 18 months. I had worked there for over 10 years.

They now want me to sign a settlement that forgoes my claim to gratuity and any salary not paid last year. Instead, they will pay me over the next 10 months 10k per month plus a 50k 'thank you'.

After doing some investigation I have discovered that their trade license expired in November 2020. Will I be able to make any claim against them as they don't have a valid trade license?

Also, the owner is currently in the UK and I have no idea if he plans to return. The company was in a torrid state when I left in terms of their finances.

Hence I was thinking of getting what I could from them as I don't believe there are any assets worth selling as it's a service industry and that any hope of getting what I'm due seems unlikely. Advice?