No, it is not possible to extract the project files from ThinApp binaries.
Decompilation is very easy. If developers want not to pulish such info, you can get solution by private message.
Could you please advise me how to decompile the container thinapp file please? I have DAT file thinapp cotainer which I urgently need to have decompiled for thinapp tree structure. Would you give me your contact or I can give my, np.
Thanks for your help here!