Log On to www.heidenhain.com. Manuals for Your Control are available for download. You can get useful info. Try using 'TNCREMONT' Software for Parameter & Program Transfer. It works better on Heidenhain Controls than other softwares. In case you find difficulties with TNCREMONT, Heidenhain service team can give you older version of this software (known as TNCREMO). Also they have other older Data Transfer Softwares, more suitable for older controls.
All these softwares can be used in Client / Server Mode & also work as DNC. Meaning is, you do not need to shuttle between PC & Machine. Once the PC is ready, you need to work only from machine.