After a lot of misterious problems with jdownloads after upgrade from old version i decided to do a clean install. removed every mention of jdownloads from database and started fresh.

Upon install i got this error:

JInstaller: :Installeren: Fout SQL Table 'tltest_schaken.#__jdownloads_usergroups_limits' doesn't exist
Extensie Update: SQL fout verwerken zoekopdracht: DB functie is mislukt met het volgende foutnummer 1146
Table 'tltest_schaken.#__jdownloads_usergroups_limits' doesn't exist
SQL =

ALTER TABLE `#__jdownloads_usergroups_limits` ADD `importance` SMALLINT( 6 ) NOT NULL DEFAULT '0' AFTER `id`;

Seemed like it checked the tmp folder for older installation files. cleared that and it installed fine. locking this thread.

Hi,
jDownloads does not check the temp folder.
But maybe Joomla? Which installation option have you tried (upload/folder/url/discover/install from web)?