problem during install Adobe digital editions 3.0 setup

my dears,

my ADE 3.0 does'nt run now, after a half jear!

A new installaton is'nt possible, because the same mistake-info is coming: Mistake on overwriting the data file D:\Eigene Dateien\My digital Editions\welcome.epub...see image:

The delete of the program data and all other data files and a new install was also unsuccessful! The same mistake-info was shown!

Have anybody an idea or a sulution?

many thanks