Can you please re-upload the Slovenian language file?
The symptoms you described - it should not happen. Maybe you are using some very old version of iGOView. If you are using latest version, and still get the same problems - please point me to the files that are not recognized.
- some TMC files contains graphics - you can see these on Media tab. If graphics are truncated - check the option View > Read whole file.
- updated DAT files
- some temporary files remains not deleted (in your Temp folder). It will be fixed for the next release.