Thank you.

Can you check for one or more of those zip files and send those to me as well?

The last three, like these are fine:
C:\Users\zagouras\AppData\Local\Temp\BOINC Manager_dbgrpt-8376-20151211T181459.zip
C:\Users\zagouras\AppData\Local\Temp\BOINC Manager_dbgrpt-7632-20151211T183806.zip
C:\Users\zagouras\AppData\Local\Temp\BOINC Manager_dbgrpt-3940-20151211T190659.zip

That's on the system you sent me the stderrgui.txt from.

Edit, and please answer me on my question: "Are you saying that even trying to set <http_debug> will crash BOINC Manager?"
Because if it is, I have to write you a step-by-step how to on how to add the flag manually to a file.

---

Are you using BOINC Manager with the Greek language?
What happens if you set the language to English and then you try to add a project?
(Options->Other options...->General->Language->English->OK->click OK on the message about exiting & restarting BOINC Manager; File->Exit, follow normal exit procedure. Start->All Programs->BOINC->BOINC Manager. Now try to add a new project)

---

I have checked the "http_debug" and yes I' m using BOINC in Greek.

YES!!!! THIS IS IT!

THANK YOU!

Yeah, I just set to Greek and found I can easily reproduce the problem. Should've thought of this earlier, but I only just noticed that the person in the other thread is also Greek... and then it hit me, that must be it. :)

Am informing the developers further.
You can take the <http_debug> flag down again.

---

So that is what I have to do at the others pc's.
1. Check the "http_debug and
2. Change language

No, the only thing that you have to do is change the language to English or another language you're familiar with. It has nothing to do with <http_debug>
As I said, you can delete that out of the cc_config.xml file again, or set it to zero (0).

---

Thank you very much!

Phew, way easier that I try out all the test versions the developers send to me, than that I have to send those to you and give instructions on how to use them. :)

---

I have just tested a BOINC Manager version that no longer crashes when the language is set to Greek and I try to add a project. It'll appear in the next BOINC installer.

Edit: 10 builds and 3 hours further, we finally fixed it for good. It'll require a new BOINC Manager and locale files, so it's really going to need a new BOINC installer.

---