Need to access a .thumb file

I lost my phon and all i have left is some files i used to have on a Keepsafe app
I have them backedup to my laptop as .thumb files and i want to open them but i cant
I did not attach a sample because they are personal and privte sutf
if you can hlep me or if you can develop a solustion that i can use and keep my privet stuf offline i will pay more than if i had to share them with you to open them and send it back to me