Working stable version of pdfarchitect?

Hello.

Pdf architect is really a great work!

In the past, I wanted to use PDF architect three times, to merge two PDF files.

All three attempts resulted in only crashes and error messages.
Used were the versions v0.5.1, v0.5.2 and v0.5.6

The merging of mini-test-file (a file with a “Hello World”, a file with “Hello World2”) worked out great.
Realy great work!

But if the PDF files are larger, have more pages or contained graphics, pdf architect crashes from mercilessly.

When is a stable and functioning primarily version available, which you can merge such files (bigger, with graphics…)?