Hi scook and tks for your answer!
I checked what you told me and I found that Dimension LE has 2 folders: one is in C:\ProgramData\Cakewalk\Dimension LE (2,30mb) which content consists of 3 folders: MIDI (empty), Programs (same 10 folders as in C\programs(x86)\Cakewalk\Dimension le\programs) and Sample Pool (content 2 audio files, chime and noise); the main Dimension LE folder is in C\programs(x86)\Cakewalk\Dimension le (820mb content with 5 folders: Documentation, Multisamples, Programs (same content as in C:\ProgramData\Cakewalk\Dimension LE\programs), Resources and Sample Pool plus 2 .sfz files named DefaultEffects and DefaultRegion; GPO in inside "Multisample" with many other folders.
So first I made a backup of both Dimension LE folders (programdata and programs(x86), then I tried to move their contents from one folder to the other one and viceversa overwritting the files many times, but refreshing with F5 had no result. I don't know which version of Dimension LE was bundled and installed (dvd is labelled "Sonar V-Studio 100 and its PC content is: "Vs Production pack and Sonar VS", year 2009). Surely the version wasn't 1.5 as I noticed that once Dimension LE had no "ACT learn" while after upgrading to 1.5 the ACT has appeared.
Anyway tks again