ETKA Electronic Catalogue V7.5 error and solution

There are two frequently errors happened to ETKA Electronic Catalogue V7.5, what are the solution? Go on reading following parts.

Error 1:
ETKA 7.4 has been working well for a long time. There was no pressing need to try to install ETKA 7.5. Data is updated every week with no problem with the programs available on Today I got a pop up telling me « We will no longer support the currently installed ETKA version 7.4plus and it must be updated ». An « ETKA 7.5 Download now and install » button was present. Could it be this easy??? The 76.4 MB « ETKA75_Installation.exe » file was downloaded and started. After asking me to select the language (U.S. English in my case) my wishful thinking ended. « On this system no ETKA7 installation has been found. The installation will be aborted. » This happens on my Windows 7 installation as well as my XP installation. I am sure the procedure by Floryn_Pl will work, but that calls for a complete reinstallation.

If you have already 7.4 , delete folder C:\ ETKA , COPY – and paste 7.5 from other PC when you installed it . No need do whole reinstalation
I did that on 3 of my PC, updated only one and paste to all 3 .All working good inc future update. I mean delete or rename the whole folder.

Error 2:
etka 7.5 new problem  » Feature has expired (H0041)
Here’s the new dll files for ETKA 7.5
VAG ETKA dll files:
Paste to ETKA/prog1 and to ETKA/prog2
Then ETKA is working again.