Well, I should be proud of living in a country where its internet connections were sucks. Updating JOSM plugins and imagery tiles are nightmare!

But, I eventually found a better way to tackle this awesomeness, with downloading all necessary imagery tiles with SAS.Planet, exporting those tiles into single MBTiles file, then, load those mbtiles file into JOSM with MBTiles plugin.

Cheer from KAMPAR Regency, Riau Province, Indonesia,