Hexadecimal is just another way that Windows displays the Binary number and there is no difference. I have two computers (One is Windows 8.1 and the other is Windows 10 v1903) and this registry mod works on both of them. You have not included the quotation marks " " around the words Personalization and NoLockScreen have you? There should be no quotation marks. I only added them to highlight the words. Also the word Personalization must be spelled the American way (with a z, not an s).
If this doesn't work I can only suggest you check the internet for the word NoLockScreen. Sorry I can't be more help.
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