Help!

[JoshuaX]

I installed application phpbb3 forum
and then I deleted the phpbb3 forum from program "SmartFTP"
and now I can't remove the application from the Panel
Help! so I can install a new application

Error code found when confirming deletion.

File d:\inetpub\vhosts\shadowstrikers.freeaspwebhosting.org/vault_scripts/forum/APP-META.xml isn't readable.
---------------------- Debug Info -------------------------------
0: FusionSiteAppMetaDataReader.php:120
FusionSiteAppMetaDataReader::createFromFile(string 'd:\inetpub\vhosts\shadowstrikers.freeaspwebhosting.org/vault_scripts/forum/APP-META.xml')
1: class.SiteApp.php:240
SiteApp->readPackageMetadata()
2: class.cSiteApp.php:577
cSiteApp->getMetadataReader()
3: FusionSiteAppManager.php:974
FusionSiteAppManager->removeURLMapping(object of type SiteApp)
4: FusionSiteAppManager.php:804
FusionSiteAppManager->uninstallSiteApp(object of type SiteApp, boolean true, boolean true)
5: class.SiteAppsList.php:489
SiteAppsList->uninstall(array)
6: removeSiteApps.php:51