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You can search for files containing ecu.test or trace.check within these folders and delete those that belong to product versions that are currently not installed.

Preconditions

• Python is installed, preferably in a recent 3.10 version like https://www.python.org/downloads/release/python-31013/

• Cleanup script has been downloaded from here

Script execution

1. Save the script on your computer, e.g. in %USERPROFILE%\Downloads

2. Open a command prompt in this location (for instance by typing cmd in the address bar of Windows Explorer)

3. Execute the script: python CleanUpPackageCacheETTC.py --dry-run

4. During a dry-run no files will be removed, instead you will obtain output like this:
   

C:\Windows\System32\cmd.exe

C:\Users\<USER>\Downloads>python CleanUpPackageCacheETTC.py --dry-run 
Dry run: files are not removed! 
Removed C:\ProgramData\Package Cache\{3747CED2-FC49-59A0-9C84-626A634BBCDD}v2022.4.3.0 [OK] 
Skipped C:\ProgramData\Package Cache\{51898C5F-12DD-5EDA-ADDB-2724696C7B7A}v2023.3.0.0\setup ECU-TEST 2023.3.0-RC.msi 
Removed C:\Users\<USER>\AppData\Local\Package Cache\{66CEA3C0-9CDA-58A0-97F6-8B87D1F96772}v2023.3.0.0 [OK] 
Skipped C:\ProgramData\Package Cache\{E8171865-8903-597F-BE6B-1FCE01624D64}v2023.2.0.0\setup ECU-TEST 2023.2.0-RC.msi 
Skipped C:\ProgramData\Package Cache\{F90C432D-607C-54AB-A08D-F028A2F8132C}v2023.1.4.0\setup ECU-TEST 2023.1.4-RC.msi 
Skipped C:\ProgramData\Package Cache\{8E82C380-88E5-5D0C-BBD6-49146440395A}v2021.3.0.0\setup TRACE-CHECK 2021.3-RC.msi

The lines starting with Removed can safely be deleted as the corresponding versions of ecu.test or trace.check are no longer installed on the system.
The lines starting with Skipped correspond to currently installed versions of ecu.test or trace.check and must remain on the system.

• In order to delete these files automatically, open a command prompt

  • a) with administrator privileges to cleanup the installation files of products installed for all users of the system.

  • b) without administrator privileges to cleanup the installation files of products installed for the current Windows user only.

• Navigate to the script location and execute the script: python CleanUpPackageCacheETTC.py
  The script output will look like that of step 4, but the --dry-run-line will not be displayed and the files are actually removed along with the folder that contains them.
  If you run the script without administrator privileges, only installation files of products installed for the current Windows user are cleaned. In this case, for system-wide
  installed products, you will get the status [ERROR] instead of [OK]. This indicates that the script was unable to delete these files because of missing permissions.

Still missing some megabytes?

• ecu.test or trace.check stores several data locally. For instance, cached bus data bases are used across workspaces and thus need to be saved outside of it.
  The exact storage location depends on your operating system and user specific or computer specific settings.
  The default locations can be found in the help under Help/ECU-TEST-Help/Workspace/Dateiverwaltung/Lokale_Daten.html within the installation directory of

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• ecu.test.

• Per default configuration in Microsoft Windows our products ecu.test and trace.check are installed within C:\Program Files if the installer is executed with administrator privileges. 
  Otherwise the program files are stored in %LocalAppData% per default.

• It is strongly recommended not to simply delete these files, but to use the uninstaller instead (e.g. via the Start menu or using Windows Settings > Apps & features).