Web > Preview in Browser ...
is pushed, Lightroom 6 stores a web gallery preview in a new folder named this way:
After manual deleting these folders, Lightroom still continues the numbering:
Is there any way to clear these temporary folders containing previews of web galleries and reset their numbering ?
Lightroom most likely takes care about these folders somehow and this is probably not important issue, but maybe anybody knows how this works.
Do you really care what these temporary files/folders are really called?
Using the same numbers would allow to use the same several bookmarks in the web browser.
But this is not very important - galleries can be exported under any name.