Q: I logged into Plesk, went to the Domain Application Vault, clicked the Add new application icon and noticed that there were displayed 2 copies of one application at the same time. Is it possible to fix this?
A: You can fix it manually by deleting duplicate entries from mysql table siteappackages:

cd %plesk_dir%/mysql/bin

C:\Program Files\SWsoft\Plesk\MySql\bin>mysql -uadmin -psetup psa

mysql> delete siteapppackages from siteapppackages s1,siteapppackages s2 where s1.name=s2.name and s1.id>s2.id;
mysql> quit

---

Q: I'd like to know if it's possible to update the Application Vault packages. I see some of the packages are not up-to-date. How can they be updated?
A: You can update an application in the following way: delete the old application instance and install a new one.

---

Q: I have designed my own new application, following the instructions from your How-to and Building an RPM guides. But for some reason it is not visible in the vault. What's wrong and how can I fix it?
A: Please check all parameters in the info.xml file and in the spec-file (upper - and lowercase symbols and etc.).

---

Q: I have installed Plesk but I can't see any applications available in the Application Pack. What can I do?
A: Please make sure that you have all RPMs from opt/vault/* installed. And also, please check that your Plesk key allows using the Application Vault (Server -> License Management).