@EvgenyK i must stay with version 7 for a while. The lack of dictionary support, pascalscript support and mayne other breaking changes force me to stay while i have no time to migrate all this cool stuff.
You can still use DASM3 from separate folder instead of DASM7 by default, e.g from …\Data Abstract (Common)\Bin\DASM3; install PS support from pascal script git site
by other hand, you can copy uROOpenXMLImpl.pas from DA8 to your DA7 version