A new release of the InvoicePlane application is available: v1.4.7
You can download the latest version from the InvoicePlane website.
This version includes fixes for some bugs and a lot of improvements. Additionally, Abacus sponsored the implementation of the ZUGFeRD XML standard which is now available for PDF files.
Thanks to all contributors of the current version:
@Araziel, Francois Chabloz, Raymond, Massimiliano Losego, Leman, Chris De David
Thanks for the new release. One thing makes me wonder: a quick look showed the zip file for v1.4.7 on https://invoiceplane.com/downloads is not identical to the one on GitHub. Is that on purpose? If so, what are the differences?
Secondly, I noticed that the zip file on invoiceplane.com contains a __MACOSX folder, which IMHO should be removed.
Yes thats correct. The package on invoiceplane.com contains additional language files.
Thanks for the hint, I’ll update the package.
Bug detected: when creating a new invoice, the invoice-number is no longer filled in automatically!
It is a great feature, however it seems broken. I see you have been given a few reports of it but I thought I’d update with my experience:
When I have a draft invoice, I press “send email”. in 1.4.7, the invoice updates to “sent” - however the invoice number does not update! I have to set the invoice to “sent” and press “save” to have it update.
If I don’t update and save, the PDF and Guest View are missing their invoice numbers!
Thanks Kovah 
I don’t know if this is the correct thread to ask this but I just installed 1.4.7 on a root folder for a domain and i am getting a http error 500 for generating the pdf. I do not know what is wrong. in the settings, have a pdf template specified. Can someone help.
Please open a new thread for this and follow the support instructions.