When you have released version 5.4.0, you have named the folder as booster-plus-for-woocommerce-5.4.0 in the zip file!
This causes TWO plugins to be seen in the plugin list via FTP
1. booster-plus-for-woocommerce (version 5.3.9)
2. booster-plus-for-woocommerce-5.4.0 (version 5.4.0)
This causes Booster Plus for WooCommerce to be seen TWICE as well as in the Installed Plugins list in WordPress. I do not know if this causes any mess in the settings OR the databases internally!