Problem about upgrade calibre

[kel.7]

I know it sounds so stupid but here is the thing:

Couple years ago I downloaded the Calibre 2.27.0 to read e-book and then today I design to upgrade it to 3.30.0 but somehow I deleted the 2.27.0 installer already

So when I upgrade my calibre, it requested me to show the 2.27.0 installer to it which I can't and now I can't either upgrade it to 3.30.0 nor open the old 2.27.0 calibre. What should I do now?

p.s. I tried to delete the whole calibre programma but my pc want the 2.27.0 installer too. (so can't delete it now)

p.s.s. I have downloaded a 64bit calibre 2.27.0, it works but I still can't use it to upgrade.

[kovidgoyal]

All old calibre installers are available a link to the old versions is on the calibre download page.

[BetterRed]

@kel.7 - if you are still having problems

• if calibre (32bit and/or 64bit) appears in Control Panel->Programs and Features uninstall either or both;
  
• if present, delete the Program Files/Calibre2 and Program Files (X86)/Calibre2 folders, and contents;
• run a lightweight registry cleaner - here's some best free registry cleaner 2018 - watch out for extra bloat (e.g. CCleaner will offer Avast);
• If you not interested in previous calibre customisations/settings etc, delete the C:\Users\pjd10\AppData\Roaming\calibre folder.

If all else fails install Portable Calibre.

BR

[kel.7]

Originally Posted by BetterRed

@kel.7 - if you are still having problems

• if calibre (32bit and/or 64bit) appears in Control Panel->Programs and Features uninstall either or both;
  
• if present, delete the Program Files/Calibre2 and Program Files (X86)/Calibre2 folders, and contents;
• run a lightweight registry cleaner - here's some best free registry cleaner 2018 - watch out for extra bloat (e.g. CCleaner will offer Avast);
• If you not interested in previous calibre customisations/settings etc, delete the C:\Users\pjd10\AppData\Roaming\calibre folder.

If all else fails install Portable Calibre.

BR

Thanks for your advice. I tried it but the 'Calibre 2.27.0' still here and still can't delete it

[theducks]

Originally Posted by kel.7

Thanks for your advice. I tried it but the 'Calibre 2.27.0' still here and still can't delete it

You need to download that version again.
The link to older versions is under the 'support' button on the download site

Previous releases of calibre are available here.

to uninstall.
Uninstall leaves the Library and settings alone.