Yes, you can. Only if you are using a 64-bit operating system you might encounter problems.
STAN uses a new file format (*.zmfa = compressed XML code). In order to open old STAN files (*.mfa, *.xmfa) you have to start STAN in 32-bit mode. To do this click Stan32.exe in the installation folder. Old files will be automatically converted into *.zmfa format when opened.
If you save these files again they will be stored in format *.zmfa. These files can not be opened with old STAN versions!
If you click the STAN icon on your desktop STAN will start in 32-bit or 64-bit mode depending on your operating system (=default setting).
Due to changes in the password encryption system of Joomla (that's the plattform where stan2web.net is runnning on) it is not possible anymore to access the stan2web database with STAN 2.5.1103 or older.
Please download the latest STAN version (we fixed this problem starting with STAN 2.5.1201).
No, STAN was designed for Windows operating systems only.