Selected directory is not writable

That's the message I get everytime I try to save. Help!

Hi,
is it a macOS or a PC?
also which version of DLight do you use?

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Windows10, 64 bits.
I use the last :light 4.3.23, but it happened the same with the previous one

it generally means that you 've attempted to savec a sho while Windows was waiting for a reboot after an upgrade.
so you need to clean stuff a little bit...

-Close your DLight
-Open a file explorer
-navigate to C:
-in the upper side of the explorer, Select View > Show > Hidden items.
(you should see ProgramData folder)
-navigate to ProgramData/DLight folder
-send to trash everything that end or start with 'tmp'
-restart your DLight and try a save as.

tell me how it goes.
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There's nothing that ends or starts with tmp. I've searched even inside all subfolders. Any other suggestion?

By the way, i,ve found I have 2 recovery files. I've tried opening them and 'save as', but I get the same directory not writable message.