Icons of other applications appear in the proper dimension.
Rainmeter.exe

Rainmeter.exe contains all the standard resolutions from 16x16 pixels up to 512x512 pixels in 32-bit.

On the taskbar with big icons view enabled, the Manage icon appears to be sharp.

On the taskbar with big icons view enabled, the About icon appears to be sharp.

When using ALT+TAB window switcher, the Manage window icon is upscaled from 16x16 icon.

When using ALT+TAB window switcher, the About window icon is upscaled from 16x16 icon.
SkinInstaller.exe

SkinInstaller.exe contains all the standard resolutions from 16x16 pixels up to 512x512 pixels in 32-bit.

On the taskbar with big icons view enabled, the SkinInstaller icon appears to be upscaled.

When using ALT+TAB window switcher, the Manage window icon is upscaled from 16x16 icon.
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Rainmeter 4.5.13.3632 (64-bit)
Language: English (1033)
Build time: 2022-03-23 15:23:40
Windows 7 Professional 64-bit (build 7601) Service Pack 1 - English (1033)
Path: C:\Program Files\Rainmeter\
SkinPath: E:\Custo\Rainmeter\Skins\
SettingsPath: C:\Users\Focus\AppData\Roaming\Rainmeter\
IniFile: C:\Users\Focus\AppData\Roaming\Rainmeter\Rainmeter.ini
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