Here are the uninstall instructions from the IDM site: http://www.internetdownloadmanager.com/support/faq.html#general1<br /> Here is the main page for IDM (the above is under "Frequently Asked Questions"): http://www.internetdownloadmanager.com/support/index.html ----------------------------------------- <br /> You need to update your plugins. It is important to keep them updated due to continuing security fixes and improvements in those plug-ins: *Adobe Shockwave for Director Netscape plug-in, version 11.5 (you '''<u>may</u>''' need to update) *Adobe PDF Plug-In For Firefox and Netscape (you '''<u>may</u>''' need to update) *Java Plug-in 1.6.0_02 for Netscape Navigator (DLL Helper) (Firefox 3.6.x requires Java 1.6.0_10 or newer; current version 1.6.0_21) #Check your plugin versions: http://www.mozilla.com/en-US/plugincheck/ #*'''Note: plugin check page does not have information on all plugin versions''' #'''Update Shockwave for Director''' #*NOTE: this is not the same as Shockwave Flash; this installs the Shockwave Player. #*Use Firefox to download and SAVE the installer to your hard drive from the link in the article below (Desktop is a good place so you can find it). #*When the download is complete, exit Firefox (File > Exit) #*locate and double-click in the installer you just downloaded, let the install complete. #*Restart Firefox and check your plugins again. #*'''<u>Download link and more information</u>''': http://support.mozilla.com/en-US/kb/Using+the+Shockwave+plugin+with+Firefox #'''Update Adobe Reader (PDF plugin):''' #*From within your existing Adobe Reader ('''<u>if you have it already installed</u>'''): #**Open the Adobe Reader program from your Programs list #**Click Help > Check for Updates #**Follow the prompts for updating #**If this method works for you, skip the "Download complete installer" section below and proceed to "After the installation" below #*Download complete installer ('''if you do <u>NOT</u> have Adobe Reader installed'''): #**Use Firefox to download and SAVE the installer to your hard drive from the link in the article below #**On the Adobe page, un-check any extra items (i.e. Free McAfee® Security Scan Plus) then click Download button #**If you see message just under tabs, DO NOT click the Allow button, instead click below that where it says "click here to download". #**Click "Save to File"; save to your Desktop (so you can find it) #**After download completes, close Firefox #**Click the installer you just downloaded and allow the install to continue #***Note: Vista and Win7 users may need to right-click the installer and choose "Run as Administrator" #**'''<u>Download link and more information</u>''': https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox#Installing_and_updating_Adobe_Reader #*After the installation, start Firefox and check your version again. #'''Update Java:''' #* Download and update instructions: https://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox #* Removing old versions: http://www.java.com/en/download

Go to %appdata%\IDM\ and delete the "idmmzcc3" folder. You need to have firefox closed, or unlock the files with unlocker if firefox is running to delete it

Currently used by some non-paying IDM should be key block and can not be deleted. There are many ways to clear but only a few really effective way I have found most effective. See detail in the link below: [http://www.hoclamgiau1.com/2011/07/guide-to-remove-locked-key-idm.html Way uninstalling IDM]