[jist]

I think I mentioned this before a long time ago somewhere: this is a great plugin.
It may as well be a candidate to be integrated in Calibre by default.
So thanks davidfor fore creating and maintaining it!

I notice one problem when counting pdf's though.
There are pdf's that are problematic to be counted.
The process will keep running without end, without result.
These pdf's may be slightly corrupt, very complicated, not up-to-standard, etc. I don't know.

The problem is that for those there will be no pop-up or notification that they are problematic.
If you get impatient, you can click 'jobs', and if it shows something like 1%, and after 5 minutes it still shows that, you know you'd better cancel the process.

The second issue is, when you do that, there is a process that will keep running in Windows.
The process is called pdftohtml.exe
It will even keep running if you close or restart Calibre.

Cut to the chase:
1. perhaps some notification when pdf's seem problematic to count, and propose if you'd like to end the process?
2. When manually stopping the plugin or shutting down Calibre, stop the pdftohtml.exe process?