Thanking you for your encouragement... but I tried all tricks and nothing brought it back to load any program again. I have no doubt that it is not "broken", yet since there's no service or help available... it's wasted money.
I then contacted the Chinese eBay seller and he told me to return it to him and that he is willing to refund me the purchase price.
Of course the tax duty of USD 30 and return shipping of USD 18$ are my losses in this deal!
Lesson learned: In future I will think twice (trice +) before trusting Chinese "novelties" over $30 from China on eBay. Also, I need to do far more research (in how other purchasers went) before deciding to buy such an item.