Ok, I managed to find the library folder in Time Machine (sorry, but it's late in this part of the Earth!). I restored the two folders under Application Support, restarted DropZone, it asked me the serial for the license and now it seems it's working. 
I can go to bed happy again!
Thanks for your support anyway!
Regards.
1 2022-12-12 22:16:44
Re: YouTube Downloader error (7 replies, posted in Dropzone Support)
2 2022-12-12 22:08:57
Re: YouTube Downloader error (7 replies, posted in Dropzone Support)
Thanks. Any chance to get the old action back? I looked in the Time Machine backup but it seems that the Library folder is not present. 
3 2022-12-12 22:01:49
Re: YouTube Downloader error (7 replies, posted in Dropzone Support)
Thank you for the quick answer, but how is it possible that last week everyting worked and now it's broken? Just our of curiosity.
Thanks.
4 2022-12-12 21:52:35
Topic: YouTube Downloader error (7 replies, posted in Dropzone Support)
Hi all,
I am using DropZone 4.1.9 on macOS HighSierra 10.13.6 and I cannot upgrade further the operative system.
Until a couple of days ago the Youtube downloader script worked fine, then I probably updated the script, I'm not sure, and from that moment when I try to download a youtube video I get this error:
[Launching task with command line: runner.rb task-91115]
Task description file task-91115:
ACTION: "/Users/xxxxxxxxx/Library/Application Support/Dropzone/Actions/YouTube Downloader.dzbundle"
EVENT: "dragged"
VARIABLE: "path" "/Users/xxxxxxxx/Downloads"
VARIABLE: "dragged_type" "text"
VARIABLE: "tmp_folder" "/var/folders/4k/pf1bdrvx7yxdnnclxfndfny80000gn/T/"
VARIABLE: "app_version" "4.1.9"
VARIABLE: "support_folder" "/Users/xxxxxxxxx/Library/Application Support/Dropzone"
ITEMS: "https://www.youtube.com/watch?v=xxxxxxxxxxx"
Traceback (most recent call last):
File "/Applications/Dropzone 4.app/Contents/Actions/lib/python_runner.py", line 7, in <module>
import action
File "/Users/xxxxxxxx/Library/Application Support/Dropzone/Actions/YouTube Downloader.dzbundle/action.py", line 17, in <module>
import updater
File "/Users/xxxxxxxxx/Library/Application Support/Dropzone/Actions/YouTube Downloader.dzbundle/updater.py", line 38
print(f'Latest version: {version_id}, Current version {current_version}')
^
SyntaxError: invalid syntax
[Task completed]
I tried to delete the app and retrive from a Time Machine backup, deleted the folder Dropzone 4 and Dropzone in Library/Application Support, reinstall the action from the website, but with no luck.
What can I possibly do?
Again, no chance to upgrade the macOS, everything worked until few days ago.
Thanks so much.