For the older release which can be found at https://apiwiki.fxcorporate.com/api/java/trading_sdk.zip there is some documentation inside the zip.

For the newest release which can be found at https://apiwiki.fxcorporate.com/api/java/fxcm-api-7.3.3.zip there is no documentation. Unfortunately it seems like there are breaking changes in this release.

Is it even advised to use the release 7.3.3?
Which version was the previous release (in trading_sdk.zip)?