There are two options in BI Connector dialog of PowerBI for loading OBIEE reports either from cache memory (Cache option) or directly from OBIEE server (Reload option).
Note : As we are working on performance related issues in reload option (as in below image), it is suggested to use cache option.
Step 1 : Go to : C:\ProgramData\Guidanz\BI Connector
Step 2 : Delete the old cache files by deleting the 'cache' folder.
Step 3 : Now open BI Connector in PowerBI.
Step 4 : Select the cache option in BI Connector dialog.
Step 5 : As there are no reports in cache, all the reports will be loaded from OBIEE server along with the latest updates.