No need to create empty folders

[thanneken]

The plugin is creating folders named PCA and Captures-Transmissive-Gamma. I'm not sure there is ever a use case in which those folders would need to be automatically generated if they did not already exist (they are both input into the plugin, not output). I suspect the folder creation was added to prevent a fail elsewhere, but a check on "if directory exists" would be more elegant.

[thehabes]

OK, it will no longer create these by default. A peek at the refactor shows this should not cause null pointers down the line.

[thanneken]

Checked, confirmed