In the dbExpress drivers you can download from SDN, two changes are needed. One in dbxconnections.ini:
DataBase=ASA 9.0 Sample
instead of DataBase=ASA 8.0 Sample. Not mandatory, just for the ethics 😉
The other change should be made to dbxdrivers.ini:
VendorLib=dbodbc9.dll
instead of VendorLib=dbodbc8.dll. The new version of SQL Anywhere Studio has no dbodbc8.dll.